A habit of basing convictions upon evidence, and of giving to them only that degree or certainty which the evidence warrants, would, if it became general, cure most of the ills from which the world suffers.

The thing that I should wish to obtain from money would be leisure with security.

Every increase in knowledge requires an increase in wisdom

My whole religion is this: do every duty, and expect no reward for it, either here or hereafter.

If all our happiness is bound up entirely in our personal circumstances it is difficult not to demand of life more than it has to give.

With equal passion I have sought knowledge. I have wished to understand the hearts of men. I have wished to know why the stars shine. And I have tried to apprehend the Pythagorean power by which number holds sway about the flux. A little of this, but not much, I have achieved.

Everything is vague to a degree you do not realize till you have tried to make it precise.