A wise ignorance is an essential part of knowledge.

Seven years of silent inquiry are needful for a man to learn the truth, but fourteen in order to learn how to make it known to his fellow-men.

Renouncing the honors at which the world aims, I desire only to know the truth... and to the maximum of power, I exhort all other men to do the same.

The wisdom of men is worth little or nothing.

No intelligent man will ever be so bold as to put into language those things which his reason has contemplated.

Welcome out of the cave, my friend. It's a bit colder out here, but the stars are just beautiful.

He who is learning and learning and doesn't apply what he knows is like the one who is plowing and plowing and doesn't seed.