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

With the fearful strain that is on me night and day, if I did not laugh I should die.

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.

When you have shot one bird flying you have shot all birds flying. They are all different and they fly in different ways but the sensation is the same and the last one is as good as the first.

Seek not, my soul, the life of the immortals; but enjoy to the full the resources that are within thy reach.