To a man whose mind is free there is something even more intolerable in the sufferings of animals than in the sufferings of man. For with the latter it is at least admitted that suffering is evil and that the man who causes it is a criminal. But thousands of animals are uselessly butchered every day without a shadow of remorse. If any man were to refer to it, he would be thought ridiculous. And that is the unpardonable crime.

Any man who is really a man must learn to be alone in the midst of others, to think alone for others, and, if necessary, against others.

Take possession of the air, submit the elements, penetrate the last redoubts of nature, make space retreat, make death retreat.

It is the artist's business to create sunshine when the sun fails.

The greatest human ideal is the great cause of bringing together the thoughts of Europe and Asia; the great soul of India will topple our world.

To understand everything is to hate nothing.

Discussion is impossible with someone who claims not to seek the truth, but already to possess it.