What the world needs is not dogma but an attitude of scientific inquiry combined with a belief that the torture of millions is not desirable, whether inflicted by Stalin or by a Deity imagined in the likeness of the believer

Advocates of capitalism are very apt to appeal to the sacred principles of liberty, which are embodied in one maxim: The fortunate must not be restrained in the exercise of tyranny over the unfortunate.

Diversity is essential to happiness and in Utopia there is hardly any. This is a defect in all planned social systems.

God and Satan alike are essentially human figures, the one a projection of ourselves, the other of our enemies.

Much of the most important evils that mankind have to consider are those which they inflict upon each other through stupidity or malevolence or both.

One must care about a world one will not see.

We must be skeptical even of our skepticism.