He who is resolute conquers grief.

Do you want to live happily? Travel with two bags, one for giving, the other for receiving.

Whoso is content with pure experience and acts upon it has enough of truth.

The history of science is science itself; the history of the individual, the individual.

Help me to discover Thy truth, O Lord, and preserve me from those who have already found it

There is nothing more frightful than ignorance in action.

Everything transitory is but an image.