The combined wisdom and genius of all mankind cannot possibly conceive of an argument against liberty of thought.

We have at last ascertained that miracles can be perfectly understood; that there is nothing mysterious about them; that they are simply transparent falsehoods.

If I had my way I'd make health catching instead of disease.

No God can put a man in hell in another world, who has made a little heaven in this. God cannot make a man miserable if that man has made somebody else happy.

The notion that faith in Christ is to be rewarded by an eternity of bliss, while a dependence upon reason, observation, and experience merits everlasting pain, is too absurd for refutation, and can be believed only by that unhappy mixture of insanity and ignorance, called faith.

Reason is the light, the sun of the brain. It is the compass of the mind, the ever-constant Northern Star, the mountain peak that lifts itself above all clouds.

This crime called blasphemy was invented by priests for the purpose of defending doctrines not able to take care of themselves.