The least movement is of importance to all nature. The entire ocean is affected by a pebble.

Man is but a reed, the most feeble thing in nature, but he is a thinking reed.

Custom is our nature. What are our natural principles but principles of custom?

Self-preservation is the first law of nature.

It is the nature of all greatness not to be exact.

Suffering is permanent, obscure and dark, And shares the nature of infinity.

Modern morality and manners suppress all natural instincts, keep people ignorant of the facts of nature and make them fighting drunk on bogey tales.

The salary of the chief executive of a large corporation is not a market award for achievement. It is frequently in the nature of a warm personal gesture by the individual to himself.

Subdue your appetites, my dears, and you've conquered human nature.

Men are by nature merely indifferent to one another but women are by nature enemies.