Good nature is the cheapest commodity in the world, and love is the only thing that will pay ten percent to both borrower and lender.

There are some truths, however, that we should never forget: Superstition has always been the relentless enemy of science; faith has been a hater of demonstration; hypocrisy has been sincere only in its dread of truth, and all religions are inconsistent with mental freedom.

Darwin has done more to change human thought than all the priests who have existed.

The falling leaf that tells of autumn's death is, in a subtler sense, a prophecy of spring.

My objection to Christianity is that it is infinitely cruel, infinitely selfish, and, I might add, infinitely absurd.

Think of the egotism of a man who believes that an infinite being wants his praise!

As a matter of fact, no one knows that God exists and no one knows that God does not exist. To my mind there is no evidence that God exists - that this world is governed by a being of infinite goodness, wisdom and power, but I do not pretend to know.