Aristotle and Plato considered Greeks so innately superior to barbarians that slavery is justified so long as the master is Greek and the slave barbarian.

I am aware that many divines are far more marvelous than I am, and that I cannot wholly appreciate merits so far transcending my own. Nevertheless, even after making allowances under this head, I cannot but think that Omnipotence operating through all eternity might have produced something better.

What is new in our time is the increased power of the authorities to enforce their prejudices.

Drunkenness is temporary suicide.

Human nature being what it is, people will insist upon getting some pleasure out of life.

Without effort and change, human life cannot remain good. It is not a finished Utopia that we ought to desire, but a world where imagination and hope are alive and active.

It would now be technically possible to unify the world, abolish war and poverty altogether, if men desired their own happiness more than the misery of their enemies.