Man cannot be free if he does not know that he is subject to necessity, because his freedom is always won in his never wholly successful attempts to liberate himself from necessity.

We come into the world laden with the weight of an infinite necessity.

Necessity does everything well.

Necessity never made a good bargain.

To hard necessity ones will and fancy must conform.

Necessity is the author of change.

Fact I know; and Law I know; but what is this Necessity, save an empty shadow of my own mind's throwing?

If people should ever start to do only what is necessary millions would die of hunger.

It is surprising what a man can do when he has to, and how little most men will do when they don't have to.

Necessity is the mother of attraction.

Only useless things are indispensable.

Foul water will quench fire.

Necessity is the mother of invention, it is true -- but it's father is creativity, and knowledge is the midwife.

Necessity knows no law except to conquer.

The superfluous is very necessary.