In proportion to the mental energy he spent, the man who creates a new invention receives but a small percentage of his value in terms of material payment, no matter what fortune he makes, no matter what millions he earns. But the man who works as a janitor in the factory producing that invention, receives an enormous payment in proportion to the mental effort that his job requires of him. And the same is true of all men between, on all levels of ambition and ability.

Learn to value yourself, which means: fight for your happiness.

One can't love man without hating most of the creatures who pretend to bear his name.

An attempt to achieve the good by force is like an attempt to provide a man with a picture gallery at the price of cutting out his eyes.

Achieving life is not the equivalent of avoiding death.

Guilt is a rope that wears thin.

Observe, in politics, that the term extremism has become a synonym of "evil," regardless of the content of the issue (the evil is not what you are extreme about, but that you are "extreme" - i.e., consistent).