“All we do is to look after the opinions and learning of others: we ought to make them our own.”

“Learned we may be with another man's learning: we can only be wise with wisdom of our own.”

“It is an absolute perfection and virtually divine to know how to enjoy our being rightfully. We seek other conditions because we do not understand the use of our own, and go outside of ourselves because we do not know what it is like inside. Yet there is no use our mounting on stilts, for on stilts we must still walk on our own legs. And on the loftiest throne in the world we are still sitting only on our own rump.”

“I do not believe, from what I have been told about this people, that there is anything barbarous or savage about them, except that we all call barbarous anything that is contrary to our own habits.”

“Would I fortify myself against the fear of death, it must be at the expense of Seneca: would I extract consolation for myself or my friend, I must borrow it from Cicero.  I might have found it in myself, had I been trained to make use of my own reason.  I do not like this relative and mendicant understanding; for though we could become learned by other men's learning, a man can never be wise but by his own wisdom.”

“No matter that we may mount on stilts, we still must walk on our own legs. And on the highest throne in the world, we still sit only on our own bottom.”

“Let this variety of ideas be set before him; he will choose if he can; if not, he will remain in doubt. Only the fools are certain and assured. For if he embraces Xenophon's and Plato's opinions by his own reasoning, they will no longer be theirs, they will be his. He who follows another follows nothing. He finds nothing; indeed he seeks nothing. We are not under a king; let each one claim his own freedom [Seneca]. Let him know that he knows, at least. He must imbibe their ways of thinking, not learn their precepts. And let him boldly forget, if he wants, where he got them, but let him know how to make them his own. Truth and reason are common to everyone, and no more belong to the man who first spoke them than to the man who says them later. It is no more according to Plato than according to me, since he and I understand and see it the same way. The bees plunder the flowers here and there, but afterward they make of them honey, which is all theirs; it is no longer thyme or marjoram. Even so with the pieces borrowed from others; he will transform and blend them to make a work of his own, to wit, his judgment. His education, work, and study aim only at forming this.”