Love is the only thing that increases twofold every time it is shared.

The thinking man must oppose all cruelties no matter how deeply rooted in tradition or surrounded by a halo.

The friend of nature is the man who feels himself inwardly united with everything that lives in nature, who shares in the fate of all creatures, helps them when he can in their pain and need, and as far as possible avoids injuring or taking life.

I do not know what your destiny may be, but I do know this, that not one of you will find the happiness that each of you is seeking until you have first sought and found a way in which to unselfishly serve others.

Ethics is the activity of man directed to secure the inner perfection of his own personality.

We cannot understand what happens in the universe. What is glorious in it is united with what is full of horror. What is full of meaning is united to what is senseless. The spirit of the universe is at once creative and destructive — it creates while it destroys and destroys while it creates, and therefore it remains to us a riddle. And we must inevitably resign ourselves to this.

Civilization can only revive when there shall come into being in a number of individuals a new tone of mind independent of the one prevalent among the crowd and in opposition to it. A new public opinion must be created privately and unobtrusively. The existing one is maintained by the press, by propaganda, by organization, and by financial influences which are at its disposal. The unnatural way of spreading ideas must be opposed by the natural one, which goes from man to man and relies solely on the truth of the thoughts and the hearer's receptiveness of new truth.