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

It is a mania shared by philosophers of all ages to deny what exists and to explain what does not exist.

Man is the only creature that refuses to be what he is.

Let us permit nature to have her way. She understands her business better than we do.

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.