At the bottom of religious persecution is the doctrine of self-defence; that is to say, the defence of the soul. If the founder of Christianity had plainly said: 'It is not necessary to believe in order to be saved; it is only necessary to do, and he who really loves his fellow-men, who is kind, honest, just and charitable, is to be forever blest' - if he had only said that, there would probably have been but little persecution.

Liberty sustains the same relation to mind that space does to matter.

The real searcher after truth will not receive the old because it is old, or reject the new because it is new. He will not believe men because they are dead, or contradict them because they are alive. With him an utterance is worth the truth, the reason it contains, without the slightest regard to the author. He may have been a king or serf - a philosopher or servant, - but the utterance neither gains nor loses in truth or reason. Its value is absolutely independent of the fame or station of the man who gave it to the world.

Temptations are as thick as the leaves of the forest, and no one can be out of the reach of temptation unless he is dead. The great thing is to make people intelligent enough and strong enough, not to keep away from temptation, but to resist it.

To the wise man, to the wise nation, the mistakes of the past are the torches of the present.

If there be gods we cannot help them, but we can assist our fellow men. We cannot love the inconceivable, but we can love wife and child and friend.

God so loved the world that he made up his mind to damn a large majority of the human race.