Reason, observation, and experience; the holy trinity of science.

Custom meets us at the cradle and leaves us only at the tomb.

By nature all people are alike, but by education become different

It cannot be said too often that actions are good or bad in the light of consequences, and that a clear perception of consequences would control actions. That which increases the sum of human happiness is moral; and that which diminishes the sum of human happiness is immoral. . . . Blind, unreasoning obedience is the enemy of morality.

Whoever imagines himself a favorite with God holds others in contempt.

Orthodox Christians have the habit of claiming all great men, all men who have held important positions, men of reputation, men of wealth. As soon as the funeral is over clergymen begin to relate imaginary conversations with the deceased, and in a very little while the great man is changed to a Christian - possibly to a saint.

The only thing that makes life endurable in this world is human love, and yet, according to Christianity, that is the very thing that we are not to have in the other world. We are to be so taken up with Jesus and angels, that we shall care nothing about our brothers and sisters that have been damned. We shall be so carried away with the music of the harp that we shall not even hear the wail of father and mother. Such a religion is a disgrace to human nature.