Health is the soul that animates all the enjoyments of life, which fade and are tasteless without it.

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.

Any man who wants to be president is either an egomaniac or crazy.