The final proof of greatness lies in being able to endure contumely without resentment.

In the Life of Darwin by his son, there is related an incident of how the great naturalist once studied long as to just what a certain spore was. Finally he said, "It is this, for if it isn't, then what is it?" And all during his life he was never able to forget that he had been guilty of this unscientific attitude, for science is founded on certitude, not assumption.

God is good, there is no devil but fear.

Action is thought tempered by illusion.

Cultivate only the habits that you are willing should master you

Where parents do too much for their children, the children will not do much for themselves.

The man who craves disciples and wants followers is always more or less of a charlatan. The man of genuine worth and insight wants to be himself; and he wants others to be themselves, also.