Nature teaches more than she preaches. There are no sermons in stones. It is easier to get a spark out of a stone than a moral.

For anything worth having one must pay the price and the price is always work, patience, love, self-sacrifice - no paper currency, no promises to pay, but the gold of real service.

The Kingdom of Heaven is not a place, but a state of mind.

Joy in the universe, and keen curiosity about it all - that has been my religion.

If we take science as our sole guide, if we accept and hold fast that alone which is verifiable, the old theology must go.