One of the chief triumphs of modern mathematics consists in having discovered what mathematics really is.

Morally, a philosopher who uses his professional competence for anything except a disinterested search for truth is guilty of a kind of treachery.

Never let yourself be diverted, either by what you wish to believe, or what you think could have beneficent social effects if it were believed; but look only and solely at what are the facts.

The universe may have a purpose, but nothing we know suggests that, if so, this purpose has any similarity to ours.

We are told that Sin consists in acting contrary to God's commands, but we are also told that God is omnipotent. If He is, nothing contrary to His will can occur; therefore when the sinner disobeys His commands, He must have intended this to happen.

Man needs, for his happiness, not only the enjoyment of this or that, but hope and enterprise and change.

Even in civilized mankind faint traces of monogamous instinct can be perceived.