The hands that help are better far than lips that pray.

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.

Nothing could add to the horror of hell, except the presence of its creator, God. While I have life, as long as I draw breath, I shall deny with all my strength, and hate with every drop of my blood, this infinite lie.

But honest men do not pretend to know; they are candid and sincere; they love the truth; they admit their ignorance, and they say, We do not know.

It is hard to overstate the debt we owe to the men and women of genius.

The church in all ages and among all peoples has been the consistent enemy of the human race. Everywhere and at all times, it has opposed the liberty of thought and expression. It has been the sworn enemy of investigation and intellectual development. It has denied the existence of facts, the tendency of which was to undermine its power. It has always been carrying fagots to the feet of Philosophy. It has erected the gallows for Genius. It has built the dungeon for Thinkers.

Happiness is not a reward - it is a consequence. Suffering is not a punishment - it is a result.