Robert A. Heinlein II

Women and cats will do as they please, and men and dogs should relax and get used to the idea.

Love is that condition in which the happiness of another person is essential to your own.

Happiness consists in getting enough sleep. Just that, nothing more.

I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do.

Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy - in fact, they are almost incompatible; one emotion hardly leaves room for the other.

Progress isn't made by early risers. It's made by lazy men trying to find easier ways to do something.

There ain't no such thing as a free lunch

Sex, whatever else it is, is an athletic skill. The more you practice, the more you can, the more you want to, the more you enjoy it, the less it tires you.

Sin lies only in hurting others unnecessarily. All other "sins" are invented nonsense.

Climate is what you expect, weather is what you get.

One man's theology is another man's belly laugh.

Belief gets in the way of learning.

A generation which ignores history has no past — and no future.