Man, alone, has the power to transform his thoughts into physical reality; man, alone, can dream and make his dreams come true.

The math is dead simple: it seems that the frequency of planets able to support life is roughly one percent. In other words, a billion or more such worlds exist in our galaxy alone. That's a lot of acreage, and it takes industrial-strength credulity to believe it's all bleakly barren.

Those who occupy their minds with small matters, generally become incapable of greatness.

The truths of religion are never so well understood as by those who have lost the power of reason.

I'm a practical person. I'm not too bad a carpenter. I can renovate houses.