Should I not be proud, when for twenty years I have had to admit to myself that the great Newton and all the mathematicians and noble calculators along with him were involved in a decisive error with respect to the doctrine of color, and that I among millions was the only one who knew what was right in this great subject of nature?

There is nothing insignificant in the world. It all depends on how one looks at it.

To accept good advice is but to increase one's own ability.

He loves not who does not see the faults of the beloved as virtues.

Errors belong to libraries; truth, to the human mind.

We are our own devils; we drive ourselves out of our Edens.

As soon as you are in a social setting, you better take away the key to the lock of your heart and pocket it; those who leave thekey in the lock are fools.