Judgement can do without knowledge: but not knowledge withou... - Michel de Montaigne, The Complete Essays

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

"We must not attach knowledge to the mind, we have to incorporate it there."

"Every other knowledge is harmful to him who does not have knowledge of goodness."

"Man is certainly stark mad; he cannot make a worm, and yet he will be making gods by dozens."

"Nothing is so firmly believed as that which we least know."