"Logic is the most useful tool of all the arts. Without it no science can be fully known. It is not worn out by repeat…"

"The head of Christians does not, as a rule, have power to punish secular wrongs with a capital penalty and other bodi…"

"Numquam ponenda est pluralitas sine necessitate"

"Frustra fit per plura, quod potest fieri per pauciora."

"It is on account of theology alone that any assertion whatsoever should be called catholic or heretical. For only an …"

"The Holy Spirit through blessed John the evangelist makes a terrible threat against those who add anything to or take…"

"Purely philosophical assertions which do not pertain to theology should not be solemnly condemned or forbidden by any…"

"Entia non sunt multiplicanda praeter necessitatem."

"Historically, Ockham has been cast as the outstanding opponent of Thomas Aquinas (1224–1274): Aquinas perfected the g…"

"From the middle of the Nineteenth Century, nearly every modern book on Logic has contained the words: Entia non sunt …"