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April 10, 2026
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"Melody as revealed in the greatest works of our classics is one of the most noble gifts which an invisible deity has bestowed on mankind."
"When during my stay in Egypt I became familiar with the works of Nietzsche, whose polemic against christianity was particularly to my liking, the antipathy which I had always felt against a religion which relieves the faithful of responsibility for their actions (by means of confession) was confirmed and strengthened."
":10. If you follow these rules carefully you will, with your fine gifts and great accomplishments, always be the darling of your listeners."
":9. When you think you have reached the limits of prestissimo, go twice as fast. (1948 Today, I should like to ammend this as follows: Go twice as slowly - addressed to conductors of Mozart)."
":8. Always accompany a singer in such a way that he can sing without effort."
":7. It is not enough that you yourself can hear every word the soloist sings - you know it off by heart anyway: the audience must be able to follow without effort. If they do not understand the words they will go to sleep."
":6. If you think that the brass is not blowing hard enough, tone it down another shade or two."
":5. But never let the horns and woodwind out of your sight: if you can hear them at all they are still too strong."
":4. Never look encouragingly at the brass, except with a short glance to give an important cue."
":3. Conduct 'Salome' and 'Elektra' as if they were by Mendelssohn: fairy music."
":2. You should not perspire when conducting: only the audience should get warm."
":1. Remember you are making music not to amuse yourself but to delight the audience."
"Ten Golden Rules (for the album of a young conductor)"
"It is better to conduct with the ear instead of with the arm: the rest follows automatically."
"The left hand has nothing to do with conducting. Its proper place is the waistcoat pocket from which it should only emerge to restrain or make some minor gesture for which in any case a scarcely perceptible glance should suffice."
"Conducting is, after all, a difficult business – one has to be seventy years of age to realise this fully!"
"Producers of opera nowadays usually make the mistake of translating each particular orchestral phrase into terms of a movement on the stage. In this matter one should proceed with a maximum of caution and good taste. There is no objection to bringing life to into the production by changes of position and new nuances of acting during repetitive passages of music, especially in arias. Preludes of one or two bars frequently, and especially in Mozart, clearly express some gesture on stage. But each trill on the flute does not represent a wink on the prima donna, nor every delayed chord on the strings a step or gesture. Whole passages, especially in the finales, are pure concert music and are best left undisturbed by “play acting”."
"I am convinced that the decisive factor in dramatic effect will be a smaller orchestra, which does not drown out the human voice as does a large orchestra…The orchestra of the opera of the future is the chamber orchestra which, by painting in the background of the action on the stage with crystalline clearness, can alone realise precisely the intention of the composer with regard to the vocal parts. It is after all an important desideratum that the audience should not only hear the sounds but should also be able to follow the words closely."
"If my works are good and of any importance for the further development of our art, they will maintain their position in spite of all opposition on the part of critics, and in spite of all denigration of my artistic intentions. If they are worthtless, not even the most gratifying box office success or the most enthusiastic acclamation of augurs will keep them alive. Let the pulping press devour them...I shall not shed a tear over their grave."
"When it comes to the music of Richard Strauss, the bowing makes the fiddler grouse."
"I have enjoyed most particularly reading the correspondence between Gustav Mahler and Richard Strauss. The genuine friendship, competitiveness and support that thread through their communications are life lessons for us all."
"Strauss, the new conductor, seemed a hopeless failure; he kept the band as smooth, and also inane, as a linen collar; and his tempi, except for the occasional gallop in the wrong place, were for the most part insufferably slow. We all sat wishing we had not come, and that Strauss had never been born."
"The Symphonia Domestica was amusing and annoying by turns; but with some lovely bits."
"Nam filum labyrintho de compositione continui deque maximo et minimo ac indesignabili at que infinito non nisi geometria praebere potest, ad metaphysicam vero solidam nemo veniet, nisi qui illac transiverit."
"Theologus: Amare autem? Philosophus: Felicitate alterius delectari."
"Languages are the best mirror of the human mind [and] the most ancient monuments of peoples."
"quando orientur controversiae, non magis disputatione opus erit inter duos philosophos, quam inter duos computistas. Sufficiet enim calamos in manus sumere sedereque ad abacos, et sibi mutuo (accito si placet amico) dicere: calculemus"
"Pour ce qui est des connaissances non-écrites qui se trouvent dispersées parmi les hommes de différents professions, je suis persuadé qu’ils passent de beaucoup tant à l'égard de la multitude que de l'importance, tout ce qui se trouve marqué dans les livres, et que la meilleure partie de notre trésor n'est pas encore enregistrée."
"TO LOVE is to find pleasure in the happiness of others. Thus the habit of loving someone is nothing other than BENEVOLENCE by which we want the good of others, not for the profit that we gain from it, but because it is agreeable to us in itself. CHARITY is a general benevolence. And JUSTICE is charity in accordance with wisdom. … so that one does not do harm to someone without necessity, and that one does as much good as one can, but especially where it is best employed."
"As regards the objection that possibles are independent of the decrees of God I grant it of actual decrees (although the Cartesians do not at all agree to this), but I maintain that the possible individual concepts involve certain possible free decrees; for example, if this world was only possible, the individual concept of a particular body in this world would involve certain movements as possible, it would also involve the laws of motion, which are the free decrees of God; but these, also, only as possibilities. Because, as there are an infinity of possible worlds, there are also an infinity of laws, certain ones appropriate to one; others, to another, and each possible individual of any world involves in its concept the laws of its world."
"Chaque substance est comme un monde à part, indépendant de toute autre chose, hors de Dieu..."
"Omne possibile exigit existere."
"To love is to be delighted by the happiness of someone, or to experience pleasure upon the happiness of another. I define this as true love."
"Leibnitz, dominated by ideas of communication, is, in more than one way, the intellectual ancestor of the ideas of this book, for he was also interested in machine computation and in automata. My views in this book are very far from being Leibnitzian, but the problems with which I am concerned are most certainly Leibnitzian. Leibnitz's computing machines were only an offshoot of his interest in a computing language, a reasoning calculus which again was in his mind, merely an extention of his idea of a complete artificial language. Thus, even in his computing machine, Leibnitz's preoccupations were mostly linguistic and communicational."
"Leibnitz, though not propounding any full doctrine on evolution, gave it an impulse by suggesting a view contrary to the sacrosanct belief in the immutability of species... His punishment at the hands of the Church came a few years later, when in 1712, the Jesuits defeated his attempt to found an Academy of Science at Vienna."
"The lack of early practice in mathematics left its mark on Leibniz's later mathematical style, in which good ideas are sometimes inefficiently developed through lack of technical skill. Often he seemed to lack not only the technique but also the patience to develop the ideas conceived by his wide-ranging imagination."
"Leibniz's work lacked the depth and virtuosity of Newton's, but then Leibniz was a librarian, a philosopher, and a diplomat with only a part-time interest in mathematics."
"Leibniz's apparent corelessness stands for a fundamental philosophical problem, a quandary that reaches to the foundations of his system of philosophy. In the metaphysics he... presented to the world, Leibniz claimed that the one thing of which we can all be certain is the unity, permanence, immateriality, and absolute immunity to outside influence of the individual mind. In identifying the mind as a "monad"—the Greek word for "unity"—he positioned himself in direct opposition to Spinoza, whose allegedly materialist philosophy of mind he adamantly rejected. And yet the philosopher who made the unity of the individual the fundamental principle of the universe was himself incomparably fragmented, multiplicitous, exposed to the influence of others, and impossible to pin down. How could a monad be so multifarious, not to say nefarious?"
"Long before most of these facts were discovered, Leibnitz had conjectured that originally the earth in general, even in the north, enjoyed a much warmer temperature than in the present period of all-ruling and progressive frost; and Buffon and others have established on this idea their hypothesis of a vast central fire in the interior of the earth. The interior parts of the earth and its internal depths are a region totally impervious to the eye of mortal man, and can least of all be approached by those ordinary paths of hypothesis adopted by naturalists and geologists."
"In Leibniz, a vast edifice of deduction is pyramided upon a pin-point of logical principle. In Leibniz, if the principle is completely true and the deductions are entirely valid, all is well; but the structure in unstable, and the slightest flaw anywhere brings it down in ruins."
"In Locke's own day, his chief philosophical opponents were the Cartesians and Leibniz. ...Until the publication of Kant's Critique of Pure Reason in 1781, it might have seemed as if the older philosophical tradition of Descartes, Spinoza, and Leibniz were being definitely overcome by the newer empirical method. The newer method, however, had never prevailed in German universities, and after 1792 it was held responsible for the horrors of the Revolution."
"Plato, in the Theaetetus, had set to work to refute the identification of knowledge with perception, and from his time onwards almost all philosophers, down to and including Descartes and Leibniz, had taught that much of our most valuable knowledge is not derived from experience."
"[We] will discuss Soul and Body, the doctrine of God, and Ethics. ...We shall find that Leibniz no longer shows great originality, but tends, with slight alterations of phraseology, to adopt (without acknowledgment) the views of the decried Spinoza. We shall find also many more minor inconsistencies than in the earlier part of [Leibniz's] system, these being due chiefly to the desire to avoid the impieties of the Jewish Atheist, and the still greater impieties to which Leibniz's own logic should have led him."
"The principle premisses of Leibniz's philosophy appear to me to be five... : I. Every proposition has a subject and a predicate. II. A subject may have predicates which are qualities existing at various times. (Such a subject is called a substance.) III. True propositions not asserting existence at particular times are necessary and analytic, but such as assert existence at particular times are contingent and synthetic. The latter depend upon final causes. IV. The Ego is a substance. V. Perception yields knowledge of an external world, ie. of existents other than myself and my states. The fundamental objection to Leibniz's philosophy will be found to be the inconsistency of the first premiss with the fourth and fifth; and in this inconsistency we shall find a general objection to Monadism."
"As an interpreter of nature... Leibnitz stands in no comparison with Newton. His general views in physics were vague and unsatisfactory; he had no great value for inductive reasoning; it was not the way of arriving at truth which he was accustomed to take; and hence, to the greatest physical discovery of that age, and that which was established by the most ample induction, the existence of gravity as a fact in which all bodies agree, he was always incredulous, because no proof of it, a priori could be given."
"Substances do not interact. Every substance is eternal. Bodies are phenomena, not independently real. Choices are determined but free. This is the best possible world. I first encountered Leibniz in an introduction to Modern Philosophy and the image of him as a philosopher so enthralled with his reasoning as to deny the reality in front of him stuck with me for a long time. It wasn't that his arguments were bad, but that their conclusions seemed obviously false. Wouldn't a swift kick in the shin suffice to prove that substances do interact, that bodies are real, and perhaps even that this is not the best possible world? This image of Leibniz as naive and detached from reality was cemented by Voltaire's satirical character Dr Pangloss, who insists over and over again - in the face of the worst suffering and injustice - that this is the best possible world. There is some irony in this image of Leibniz, as Leibniz was the far opposite of an 'ivory tower' philosopher. He consistently pursued positions that would increase his political influence over positions that would increase his leisure for study and reflection. Leibniz claimed the progress of knowledge as his main goal, but he approached this goal from two sides, on one side through his own research and writing while on the other side promoting institutions that would better support, disseminate, and apply knowledge. Today, Leibniz is best known or at least most widely read for his philosophical writings, but philosophy represents only a small part of his life's work. Although this book will focus on explaining Leibniz's philosophy, that philosophy must be approached from within the broader context of his life and time."
"In letters which went between me and that most excellent geometer. G.G. Leibniz, ten years ago, when I signified that I was in the knowledge of a method of determining maxima and minima, of drawing tangents, and the like, and when I concealed it in transposed letters involving this sentence (Data æquatione, etc., above cited) that most distinguished man wrote back that he had also fallen upon a method of the same kind, and communicated his method, which hardly differed from mine, except in his forms of words and symbols."
"Plus un, moins un, plus un, moins un, etc. En ajoutant les deux premiers termes, les deux suivans, et ainsi du reste, on transforme la suite dans une autre dont chaque terme est zéro. Grandi, jésuite italien, en avait conclu la possibilité de la création; parce que la suite étant toujours égale à ½, il voyait cette fraction naìtre d'une infinité de zéros, ou du néant. Ce fut ainsi que Leibnitz crut voir l'image de la création, dans son arithmétique binaire ou il n'employait que les deux caractères zéro et l'unité. Il imagina que l'unité pouvait représenter Dieu, et zéro, lé néant; et que l'Être Suprême avait tiré du néant, tous les êtres; comme l'unité avec le zéro, exprime tous les nombres dans ce système. Cette idée plut tellement à Leibnitz, qu'il en fit part au jésuite Grimaldi, président du tribunal des mathématiques à la Chine, dans l'espérance que cet emblème de la création convertirait au christianisme, l'empereur d'alors qui aimait particulièrement le sciences. Je ne rapporte ce trait, que pour montrer jusqu'à quel point les préjugés de l'enfance peuvent égarer les plus grands hommes."
"When the Eleatic School denied the possibility of motion, Diogenes, as everybody knows, stepped forth as an opponent. He stepped forth literally, for he said not a word, but merely walked several times back and forth, thinking that thereby he had sufficiently refuted those philosophers. Inasmuch as for a long time I have been engaged, at least occasionally, with the problem whether a repetition is possible and what significance it has, whether a thing gains or loses by being repeated, it suddenly occurred to me, "Thou canst take a trip to Berlin, where thou hast been before, and convince thyself now whether a repetition is possible and what significance it may have." At home I had almost been brought to a standstill by the problem. Say what one will, it is sure to play a very important role in modem philosophy; for repetition is a decisive expression for what "recollection" was for the Greeks. Just as they taught that all knowledge is a recollection, so will modem philosophy teach that the whole of life is a repetition. The only modem philosopher who had an inkling of this was Leibnitz ."
"Of all the works of Leibnitz, the "Theodicee" is the one most spoken of in Germany. Yet it is his feeblest production. This book, like several other writings in which Leibnitz expresses his religious sentiments, has obtained for its author an evil reputation, and has caused him to be cruelly misunderstood. His enemies have accused him of maudlin sentimentality and weakness of intellect; his friends, in defending, have proved him an accomplished hypocrite. The character of Leibnitz was for long a subject of controversy amongst us : the most partial critics could not absolve him from the accusation of duplicity; his most eager detractors were the freethinkers and the men of enlightenment. How could they pardon in a philosopher defence of the Trinity, eternal punishment, and the divinity of Christ! Their tolerance did not extend so far as that. But Leibnitz was neither fool nor knave, and by the lofty harmony of his intellect he was well able to defend Christianity in its integrity. I say, in its integrity, for he defended it against semi-Christianity. He established the consistency of the orthodox as opposed to the inconsistency of their adversaries. More than this he never attempted. He thus stood at that point of indifference where diverse systems appear as merely different sides of the same truth."