During human progress, every science is evolved out of its corresponding art.

Education is preparation to live completely.

The fact disclosed by a survey of the past that majorities have been wrong must not blind us to the complementary fact that majorities have usually not been entirely wrong.

Those whose hardships are set forth in pamphlets and proclaimed in sermons and speeches which echo throughout society, are assumed to be all worthy souls, grievously wronged; and none of them are thought of as bearing the penalties of their misdeeds.

Absolute morality is the regulation of conduct in such a way that pain shall not be inflicted.

No philosopher's stone of a constitution can produce golden conduct from leaden instincts.

In science the important thing is to modify and change one's ideas as science advances.