Mysticism occurs whenever a human being sees the separation between the natural and the supernatural, between the temporal and the eternal, as overcome.

The the question whether I am a pessimist or an optimist, I answer that my knowledge is pessimistic, but my willing and hope are optimistic.

The quiet conscience is the invention of the devil. No one of us may permit any preventable pain to be inflicted even though the responsibility for that pain is not ours. No one may shut his eyes and think that the pain which is therefore not visible, is non-existent.

The time will come when public opinion will no longer tolerate amusements based on the mistreatment and killing of animals. The time will come, but when? When will we reach the point that hunting, the pleasure in killing animals for sport, will be regarded as a mental aberration?

There is much coldness among men because we do not dare to be as cordial as we really are.

If you own something you cannot give away, then you don't own it, it owns you.

Do something wonderful, people may imitate it.