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."

"[Marriage] happens as with cages: the birds without despair to get in, and those within despair of getting out."

"I quote others only in order the better to express myself."

"It is a disaster that wisdom forbids you to be satisfied with yourself and always sends you away dissatisfied and fearful, whereas stubbornness and foolhardiness fill their hosts with joy and assurance."