“...a friend of mankind with shaky moral foundation is a cannibal of mankind, to say nothing of his vainglory; insult the vainglory of one of these numberless friends of mankind, and he is ready at once to set fire to the four corners of the world out of petty vengence”

“We've already had Malthus, the friend of humanity. But the friend of humanity with shaky moral principles is the devourer of humanity, to say nothing of his conceit; for, wound the vanity of any one of these numerous friends of humanity, and he's ready to set fire to the world out of petty revenge—like all the rest of us, though, in that, to be fair; like myself, vilest of all, for I might well be the first to bring the fuel and run away myself.”

“Vainglory, however, no matter how much medieval Christianity insisted it was a sin, is a motor of mankind, no more eradicable than sex.”

“I have learned to be a friend to myself Great improvement this indeed Such a one can never be said to be alone for know that he who is a friend to himself is a friend to all mankind”

“If you were to destroy in mankind the belief in immortality, not only love but every living force maintaining the life of the world would at once be dried up. Moreover, nothing then would be immoral, everything would be permissible, even cannibalism.”

“Truthfulness is the foundation of all the virtues of mankind”