"In order to improve the mind, we ought less to learn, than to contemplate." — Rene Descartes

The first precept was never to accept a thing as true until I knew it as such without a single doubt.

The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.

Illusory joy is often worth more than genuine sorrow.

Perfect numbers like perfect men are very rare.