The practice of inhibiting impulses, which is to a great extent necessary to civilized life, makes mistakes easier, by preventing experience of the actions to which a desire would otherwise lead, and by often causing the inhibited impulses themselves to be unnoticed or quickly forgotten.

The difficulty is old, but none the less real. An omnipotent being who created a world containing evil not due to sin must Himself be at least partially evil.

The demand for certainty is one which is natural to man, but is nevertheless an intellectual vice.

Cruelty is, in theory, a perfectly adequate ground for divorce, but it may be interpreted so as to become absurd.

Men are born ignorant, not stupid. They are made stupid by education.

[There has been] every kind of cruelty practiced upon all sorts of people in the name of religion.

What men really want is not knowledge but certainty.