You must acquire the best knowledge first, and without delay; it is the height of madness to learn what you will later have to unlearn.

[Only by] the good influence of our conduct may we bring salvation in human affairs; or like a fatal comet we may bring destruction in our train.

Now what else is the whole life of mortals, but a sort of comedy in which the various actors, disguised by various costumes and masks, walk on and play each ones part until the manager walks them off the stage?

A nail is driven out by another nail. Habit is overcome by habit.

In short, no association or alliance can be happy or stable without me. People can't long tolerate a ruler, nor can a master his servant, a maid her mistress, a teacher his pupil, a friend his friend nor a wife her husband, a landlord his tenant, a soldier his comrade nor a party-goer his companion, unless they sometimes have illusions about each other, make use of flattery, and have the sense to turn a blind eye and sweeten life for themselves with the honey of folly.

What difference is there, do you think, between those in Plato's cave who can only marvel at the shadows and images of various objects, provided they are content and don't know what they miss, and the philosopher who has emerged from the cave and sees the real things?

Christians would show sense if they dispatched these argumentative Scotists and pigheaded Ockhamists and undefeated Albertists along with the whole regiment of Sophists to fight the Turks and Saracens instead of sending those armies of dull-witted soldiers with whom they've long been carrying on war with no result.