In regione caecorum rex est luscus. — Erasmus

"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."

"Animals only follow their natural instincts; but man, unless he has experienced the influence of learning and philosophy, is at the mercy of impulses that are worse than those of a wild beast. There is no beast more savage and dangerous than a human being who is swept along by the passions of ambition, greed, anger, envy, extravagance, and sensuality."

"Do not be guilty of possessing a library of learned books while lacking learning yourself."

"It might be wiser for me to avoid Camarina and say nothing of theologians. They are a proud, susceptible race. They will smother me under six hundred dogmas. They will call me heretic and bring thunderbolts out of their arsenals, where they keep whole magazines of them for their enemies. Still they are Follys servants, though they disown their mistress. They live in the third heaven, adoring their own persons and disdaining the poor crawlers upon earth. They are surrounded with a bodyguard of definitions, conclusions, corollaries, propositions explicit, and propositions implicit. ...They will tell you how the world was created. They will show you the crack where Sin crept in and corrupted mankind."

"I have no patience with those who say that sexual excitement is shameful and that venereal stimuli have their origin not in nature, but in sin. Nothing is so far from the truth. As if marriage, whose function cannot be fulfilled without these incitements, did not rise above blame. In other living creatures, where do these incitements come from? From nature or from sin? From nature, of course. It must borne in mind that in the apetites of the body there is very little difference between man and other living creatures. Finally, we defile by our imagination what of its own nature is fair and holy. If we were willing to evaluate things not according to the opinion of the crowd, but according to nature itself, how is it less repulsive to eat, chew, digest, evacuate, and sleep after the fashion of dumb animals, than to enjoy lawful and permitted carnal relations?"

"I consider as lovers of books not those who keep their books hidden in their store-chests and never handle them, but those who, by nightly as well as daily use thumb them, batter them, wear them out, who fill out all the margins with annotations of many kinds, and who prefer the marks of a fault they have erased to a neat copy full of faults."