He who knows no hardships will know no hardihood. He who faces no calamity will need no courage. Mysterious though it is, the characteristics in human nature which we love best grow in a soil with a strong mixture of troubles.

For an Impressionist to paint from nature is not to paint the subject, but to realize sensations.

I admire people who are, by nature, kind and fair to others.

Sit down before fact as a little child, be prepared to give up every conceived notion, follow humbly wherever and whatever abysses nature leads, or you will learn nothing.

Man is fully responsible for his nature and his choices.