Liberty a word without which all other words are vain.

The idea of immortality, that like a sea has ebbed and flowed in the human heart, with its countless waves of hope and fear, beating against the shores and rocks of time and fate, was not born of any book, nor of any creed, nor of any religion. It was born of human affection, and it will continue to ebb and flow beneath the mists and clouds of doubt and darkness as long as love kisses the lips of death. It is the rainbow – Hope shining upon the tears of grief.

Mental slavery is mental death, and every man who has given up his intellectual freedom is the living coffin of his dead soul.

Give me the storm and tempest of thought and action, rather than the dead calm of ignorance and faith! Banish me from Eden when you will; but first let me eat of the fruit of the tree of knowledge!

I will not attack your doctrines nor your creeds if they accord liberty to me. If they hold thought to be dangerous - if they aver that doubt is a crime, then I attack them one and all, because they enslave the minds of men.I attack the monsters, the phantoms of imagination that have ruled the world. I attack slavery. I ask for room -- room for the human mind.

The religionist is a living fossil, embedded in that rock called faith.

And why does this same God tell me how to raise my children when he had to drown his?

Let us account for all we see by the facts we know. If there are things for which we cannot account, let us wait for light. To account for anything by supernatural agencies is, in fact to say that we do not know. Theology is not what we know about God, but what we do not know about Nature.

Religion has not civilized man - man has civilized religion. God improves as man advances.