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"Trivet well describes him [ in Annales sex Regum Angliæ] as 'a zealous promoter of the interests of his order, an excellent writer of poetry, pompous in manner and speech, but kind and thoroughly liberal at heart.'"
"Even when archbishop, he confined to style himself 'frater Johannes humilis,' was assiduous in prayer and fasting, and wore only the poorest clothing. When, as provincial prior, he attended a general council at Padua, he travelled all the way on foot rather than break the rule which forbade friars to ride. When... he visited Lewes priory, he showed his affection for the monks and his own humility by sharing their simple fare in the refectory. The Franciscans styled him moon of their order, Pope Nicholas IV being the sun; both died in the same year, and the Worcester chronicler commemorates the event in verses: Sol obscuratur, sub terra luna moratur, Ordo turbatur, stellarum lux hebetatur. The sun darkens, below earth moon abides judgement, The order is disturbed, starlight dims."
"Peckham's 'Register' is the oldest of the Canterbury Registers now preserved at Lambeth. The earlier records of the see were removed by Archbishop Kilwardby."
"Where the rights of the Welsh church did not interfere with his own authority, Peckham was not severe. He begged the king to respect their ancient rights and privileges, and protested against the suppression of customs which differed from those in use in England, reminding the king how easily an embittered clergy might rouse the people to rebellion."
"For some years the discipline at Christchurch had been in a very bad state, and some of the obedientiaries had been guilty of "Converting public trusts "To very private uses," and thus incurred the penalty of excommunication. The convent indeed was almost in a state of mutiny. In order to escape from claustral discipline, the monks were in the habit of staying at the convent manors, on the pretext of looking after the tenants, and while there ventured to keep purses of their own and live like ordinary men of the world. At the last election of a prior, the convent had forced Ringmer to take an oath which hampered his action as a reformer. When the archbishop tried to put down these abuses, some of the monks, "certain sons of Belial," tried to make a bargain and drew up articles on which they insisted for a time. But the majority was too strong. They were obliged to renounce them, and the paper was publicly burnt by the archbishop. Some monks who were opposed to the prior fled, but were recaptured about the end of 1284. The king, why we know not, was angry about this..."
"Peckham jealously watched over any encroachment of his rights on the part of the temporal power, and was especially careful not to allow clerks to be tried by secular judges. We find him interfering in this way in the case of a murder which shocked the city of London even in that age of violence."
"One of the latest documents of a personal nature is the licence to the bishop of Hereford to confer orders at Wye in March 1292, in place of the archbishop, whose health, both bodily and mental gave way some time before his death. In September this event was so soon expected that prior Henry of Eastry wrote him a letter to remind him that he had promised to be buried in the cathedral and had chosen a place of rest there. All his predecessors, said the prior, reposed in the cathedral, and it would be a great scandal and a bad precedent if he did not do the like. As to the disposal of the archbishop's body the Prior had his wish. The archbishop was buried on the 19th December in the north cross aisle, near the spot where his predecessor Becket was murdered. On the tomb is an oak figure in fairly good preservation... The figure is not fixed, and it has been suggested that it did not originally belong to this tomb... but the face appears to be rather individual than conventional. It bears some resemblance in features to the figure on the archbishop's seal, of which there is a good specimen among the archives in the cathedral."
"There are engravings of the [tomb] monument in Parker's De Antiquitate Britannicæ Ecclesiæ and Dart's History and Antiquities of the Cathedral Church of Canterbury, the latter of which was published in 1726. Both are apparently from the same plate. ...There are more recent engravings in Blore's Monumental Remains of Noble and Eminent Persons, 1826, and in Britton's Cathedral Antiquities vol. i., p. xviii. The tomb must have been expensive, and funeral magnificent, for archbishop Parker tells us that Peckham left 5,305l. 17s. 2¼d., and when his executors rendered their accounts... 5s. 6d. was all the surplus they could show."
"According to Weever, Funeral Mon. 221, his heart was buried in Christchurch, London, behind the high altar."
"Prospectiva communis domini Johannis Archiepiscopi Cantuariensis, . . Fratris ordinis minorum dicti psau ♃ ad unguem castigata per eximium artium et medicine ac juris utriusque doctorem ac mathematicum peritissimum D. Facium Cardanum Mediolanensem in venerabili colegio juris peritorum Mediolani residentem. The subject of the treatise is not what is now called perspective... but it is principally concerned with elementary propositions of optics, such as the incidence of rays of light, reflexion and refraction, the non-existence of colour without light, the construction of the eye, the appearance of objects at a distance (viz., spheres as planes, and squares as oblongs); and spherical, cylindrical, and concave mirrors, whose property of conveying heat is described. The work is divided into three parts... The third treats of the stars, the rainbow, and the milky way."
"There is an illumination of the "Spera secundum fratrem J. de Pecham archiepiscopum," executed not long after the archbishop's death. In the centre is the Mouth of Hell, inscribed "Infernus." Round it are concentric circles, and on the top God sitting in an attitude of benediction. The circles are thus named Spera terre, coloured green, Spera aque, blue with white waves, Spera aerie, yellow Spera ignis, red, Celum Lune, Celum Mercurii, Celum Veneris, Celum Solis, Celum Martie, Celum Jovis, Celum Saturni, Celum Sidereum, sive Stellarum, Celum Crystallinum, sive Applanes, Celum Medium inter empireum et cristallinum motum motu simplicissimo, Celum empireum fixum et in motum, in quo est tronus Salomonis et locus Dei et Spirituum ...The Celum Medium is white. The Celum Empireum of a purplish colour, wider than the others, with 10 circles on it alternately red and yellow. The cusped circle, in which is placed the throne of God, cuts into this sphere and rests on the Celum Medium. The Deity has long hair and beard... The throne is ornamented with round headed apertures like windows. The background is blue. The description, whether written by the archbishop or not, no doubt contains his views on astronomy in a few words."
"The book which Peckham wrote in the defence of his order against William of St. Amour was probably written before he became archbishop... but the unpopularity of the friars among the clergy had extended to England, and he was obliged to defend them... They are accused by one of our chroniclers of gaining a temporary shelter on the lands of an abbey, just to rest... then, hastily building a wooden altar and covering it with the consecrated stone they carried, they celebrated mass, and it was impossible to eject them. He complains too of their poaching... by hearing the confessions of those who were ashamed to confess to the parson whom they saw every day, or who scorned to do so because he was as vicious as themselves or were afraid of his blabbing their secrets when drunk. The clergy of England... attempted to stop this abuse... and asserted that it was an unlawful... In this they were technically wrong, for pope Martin IV... had confirmed... the power of committing to "friars of the said order... the office of preaching, of hearing confessions and absolving penitents..." with a strict prohibition of any interference. The pope, however, stipulated that the faithful must confess to their parish priest once a year. But this was not observed... for the theological faculty at the university of Paris in the same year gave it as their opinion that no one was bound to confess the same sins specifically to two persons. This would be, says Peckham, to straiten the way of eternal life which the Holy Father intended by this privilege to widen."
"And therefore, Sire, altho' I am ready, so far as is in me, to dedicate the place for the Cistercian monks at Meynan, yet I could not do it without the full assent of the bishop and of his chapter, and of the parson of the place, who, with plenty of other people, have a very great horror of the approach of the forsaid monks. For though they may be good men, if God please, still they are the hardest neighbours that prelates and parsons could have. For where they plant their foot, they destroy towns, take away tithes, and curtail by their privileges all the power of prelacy."
"As you see double if you push the eye out of its place with your finger; so prelates, through evil counsel, judge a priest to be worthy of two benefices, when he ought to be contented with one."
"Formerly the Church with its prelates of old time, was golden in wisdom, silver in cleanness of life, brazen in eloquence, which are three things needful to a preacher; that is, brightness of wisdom, cleanness of life, and sonorousness of eloquence. But of the feet, the last, that is the modern prelates, part is iron through their hardness of heart, and part is clay by their carnal luxury."
"[Perspectiva communis was written to] compress into concise summaries the teachings of perspective, which [in existing treatises] are presented with great obscurity."
"Light from a concave luminous body is received most powerfully at the centre. The reason for this is that, for every point of a concave body, perpendicular rays, which are stronger than others, converge in the centre. Therefore the virtues of celestial bodies are incident most powerfully in and near the centre of the world."
"Among all the studies of natural causes and reasons, light most delights the contemplators; among the great things of mathematics, the certainty of its demonstrations most illustriously elevates the minds of its investigators; perspective must therefore be preferred to all human discourses and disciplines, in the study in which radiant lines are expounded by means of demonstrations and in which the glory is found not only of mathematics, but also physics: it is adorned with the flowers of one and the other."
"Another Oxford writer who appreciated experimental science was John Pecham... In his Perspectiva Communis Pecham gave a very clear and concise summary of contemporary optics, based largely on Alhazen, Witelo, and pseudo-Euclid's De Speculis. His book contained nothing original but it remained a popular text book until the seventeenth century."
"In the study of light, he said, the argument proceeded both from the effect to the cause and from the cause to the effect, and he prayed God, the light of all, to help him. He arranged his work as a structure of theory built up from a set of empirical facts and the rules of geometry, with the argument sometimes ascending inductively to a 'common nature' and the grasping of a universal, and sometimes descending deductively by 'composition' to consequences by means of which a theory could be verified or falsified by experiment."
"Giambattista della Porta, who seems to have been the first to try combinations of lenses to form a microscope, based his optical work almost entirely on that of Roger Bacon, Witelo, and Pecham."
"Pecham's Perspectiva was published in as many as nine editions, one in Italian, between 1482 and 1627."
"In the realm of psychology (in the medieval sense), Pecham's writings are extensive. ...each soul is created singly and "daily" by God. The soul... is everywhere in its little world as God is everywhere in the the bigger world. The soul is united to the body as a form is to matter. ...The human will is free and cannot be coerced by anything else. ...The will is free to the extent that it can withhold consent to the dictates of practical reason."
"The Perspectiva is a clear and concise summary of the science of light at the time... a popular text on optics until the seventeenth century... used and cited by many medieval and Renaissance scholars, including Leonardo da Vinci and Johannes Kepler."
"The difference between Pecham's Tractatus de perspectiva and his Perspectiva communis is striking. The former has significant religious content and was apparently intended as a devotional aid. The latter deals exclusively with optics, and reveals neither biblical nor theological influence."
"Following Ibn-Haytham [ and his Book of Optics with regard to the Moon illusioin ] Pecham supports the intervening objects theory. However, the interposition of vapours is also thought to produce enlargement by refraction. This work probably predates Pecham's Perspectiva communis (1275)."
"There were many natural philosophers, particularly in the West, who looked to al-Kindi for support in their defense of a combined intromission-extramission theory. Grosseteste, an early defender of such a combined theory, was in all likelihood familiar with al-Kindi's De aspectibus and probably had al-Kindi in mind when he wrote: "However, mathematicians and physicists, whose concerns is with those things that are above nature, ...maintain that vision is produced by extramission." Later in the thirteenth century Roger Bacon and John Pecham also appealed to the authority of al-Kindi to support their contention that rays issue from, as well as enter, the observer's eye."
"Bacon's scientific interests were also shared by John Pecham, future Archbishop of Canterbury, who may have been among his students in his days as a secular master, and who certainly lived with him in Paris in the 1260s and 1270s. Pecham's later work on optics, astrology and astronomy was influenced by Bacon."
"The marked superiority of Ibn al-Haytham's treatise did not necessarily cause interested readers, even those of intelligence, to reject the Optics out of hand. On the contrary, it was precisely among the most avid disciples of Ibn al-Haytham in the West—the so-called Perspectivists, whose members included Roger Bacon, Witelo, and John Pecham—that Ptolemy's Optics found the most eager audience."
"Witelo seems to have used the Optics more sparingly than Bacon, and this trend continues with John Pecham, whose Perspetiva communis reveals no unequivocal borrowings and has only a handful of possible ones."
"In the four mediaeval documents which form the text of this volume, we have an interesting survival of the efforts of three of the earliest of the English Reformers. For John de Thoresby and John Peckham, the Northern and the Southern Primates, no less than John de Wyclif, the Oxford scholar and leader, deserved that title. All three men were anxious, before everything else, to amend the carelessness and the inconsistency of the clergy, and the consequent ignorance and corruption of the laity of their day."
"In 1278 he was appointed Archbishop of Canterbury by Nicholas III., in spite of the attempts made by Edward I. to gain the preferment for his chancellor, Robert Burnell, Bishop of Bath and Wells; but was not consecrated till the spring of the following year. He was well received by the king and showed himself a strong prelate, a determined foe of pluralists, and quite ready to champion the cause of ecclesiastical reform against the king himself, when need arose."
"Like Thoresby in the following century, he was most assiduous in his endeavours to improve the education and the discipline of the clergy of his province; and to this end mainly, summoned the Council which sat at Lambeth, from the 7th to 10th of October 1281."
"It has been observed that as Wycliffe displays a bias against prelates and friars, so does Peckham against the secular clergy, and this is shown by his Lambeth Canons. But that monks came equally under his lash when they deserved it, is proved..."
"Follow the Constitutions... which consists of the Lambeth Canons, ix—xiii. They run in the name of the Archbishop, who begins by stating his desire to remedy present evils, and his hope to make progress in that direction, by the favour of Christ, and with the assistance of his brethren and bishops. Ignorance on the part of the clergy is the source of error in the people whom they are bound to guide. Therefore he directs that every priest shall explain to his people simply and clearly, four limes a year, the Creed, the ten commandments, the two precepts of the Gospel, viz., love to God and man, the seven works of mercy, the seven deadly sins, the seven cardinal virtues, and the seven sacraments of grace. Furthermore, lest any priest should put forward the excuse of ignorance, he (the Archbishop) will explain briefly in what these things consist. And a short and simple exposition of the elements of faith and practice, completes this division of the Canons of the Council of Lambeth."
"[There was a] long standing contention between the sees of York and Canterbury as to the right of either metropolitan to bear his cross erect in the province of the other. ...Peckham, on hearing that his brother [ William of Wickwane, Archbishop] of York had returned from abroad, and was intending to pass through his province with his cross erect, wrote a letter forbidding the clergy to show him any mark of respect, ordering them to shut the church-doors in his face, and threatening all persons, clerical and lay, with excommunication, who ventured to supply him with food, or render him the slightest service."
"Peckham was a stern man; intolerant of those, who differed from him in opinion, or who ventured to disobey his orders. But, if he was harsh to others, he was, at the same time, severe to himself. If he was rigid in exacting, from others, a strict observance of their vows, he himself was an example of the obedience which he enforced."
"The Minorites [ Franciscan Order of Friars Minor] went forth, in their long grey coats and hooded cloaks, with their rope girdles and bare feet, to preach the gospel, with more sincerity, perhaps, in their humble days when Peckham was their provincial minister, than ever afterwards."
"Peckham, with Roger Bacon, contended against the narrow views of certain of the superiors of the order, who dreaded learning, and forbade the formation of a library. A library was eventually formed, in spite of their opposition, and the room to contain it was erected at the expense of the far-famed Whittington."
"On his going to Rome, he received an appointment from the pope, being made Causarum Auditor, or Lector Palatii. The two titles describe one office. Being now both a theologian and a lawyer, he was well qualified to dispute with those heretics, who were summoned to Rome; and this, for the two years that he held the office just described, appears to have been his duty."
"The whole conduct of the monks of Canterbury, from the time of Becket's death, had in fact been directed to two objects: to emancipate themselves from the abbatial authority, as well as from the archiepiscopal jurisdiction of the primate, and in the case of elections, to force a monk into the primatial see. They were a set of turbulent, unprincipled men, always ready to side with the pope, against the king, and against the suffragans. ...no one could object to the appointment of Friar John. In the parishes, in the universities, among the nobles, as well as among the masses of the people, the mendicants were at this time popular; and the pope was willing to show his impartiality, in nominating a Franciscan as the successor of a Dominican. We can easily understand the unwillingness of Friar John to accept the office. He was a sectarian, who loved his order more than he loved the Church; and he did not consider an archbishopric superior to the high offices among the Franciscans, to which he aspired. But he was obliged to yield, and was consecrated by the pope himself, on the 19th of February, 1279."
"Ergo domine...credimus te esse aliquid quo nihil maius cogitari possit."
"God was conceived of a most pure Virgin … it was fitting that the virgin should be radiant with a purity so great that a greater purity cannot be conceived."
"God often works more by the life of the illiterate seeking the things that are God's, than by the ability of the learned seeking the things that are their own."
"But since it is better to have perception or to have omnipotence, to be pitiful or to be without passions, than not to have these attributes; how hast Thou perception, if Thou art not a body? or omnipotence, if Thou canst not do everything? or how art Thou at one and the same time pitiful and without passions? For if only bodily things have perception, since the senses with which we perceive belong and attach to the body; how canst Thou have perception, since Thou art not a body but the Supreme Spirit, which is higher than a body can be? But if perception is only knowledge or a means towards knowledge; since he who perceives, has knowledge thereby, according to the special character of the senses, by sight of colours, by taste of savours and so forth: then whatsoever has knowledge in whatsoever manner may be said without impropriety in some sense to perceive. Therefore, O Lord, although Thou art not a body, yet of a truth Thou hast in this sense perception in the highest degree, since Thou knowest all things in the highest degree; but not in the sense wherein an animal that has knowledge by means of bodily feeling is said to have perception."
"Fides quaerens intellectum"
"If God were not a necessary Being of himself, he might almost seem to be made for the use and benefit of men."
"With what reason canst thou expect that thy children should follow thy good instructions, when thou thyself givest them an ill example? Thou dost but as it were beckon to them with thy head, and shew them the way to heaven by thy good counsel, but thou takest them by the hand and leadest them in the way to hell by thy contrary example."