Praise is more obtrusive than a reproach.

Systems of morals are only a sign-language of the emotions.

I admire the courage and wisdom of Socrates in everything he did, said--and did not say.

We cannot live without valuing: but we can live without valuing what you value.

Women and egoistic artists entertain a feeling towards science that is something composed of envy and sentimentality.

Insanity in individuals is something rare - but in groups, parties, nations and epochs, it is the rule.

Just as soon as we notice that someone has to force himself to pay attention when dealing and talking with us, we have a valid demonstration that he does not love us or that he does not love us anymore.