Good books are the warehouses of ideas.

Man ... can go up against gravitation in a balloon, and why should he not hope that ultimately he may be able to stop or accelerate his drift along the Time-Dimension, or even turn about and travel the other way.

If there is no God, nothing matters. If there is a God, nothing else matters.

'It is love and reason,' I said, 'fleeing from all this madness of war.'

Strength is the outcome of need; security sets a premium on feebleness. The work of ameliorating the conditions of life -- the true civilizing process that makes life more and more secure -- had gone steadily on to a climax... And the harvest was what I saw.

Man is the unnatural animal, the rebel child of nature, and more and more does he turn himself against the harsh and fitful hand that reared him.

It is a law of nature we overlook, that intellectual versatility is the compensation for change, danger, and trouble. An animal perfectly in harmony with its environment is a perfect mechanism. Nature never appeals to intelligence until habit and instinct are useless. There is no intelligence where there is no change and no need of change. Only those animals partake of intelligence that have a huge variety of needs and dangers.