No woman ever ages beyond eighteen in her heart.

The difference between science and the fuzzy subjects is that science requires reasoning while those other subjects merely require scholarship.

The second best thing about space travel is that the distances involved make war very difficult, usually impractical, and almost always unnecessary. This is probably a loss for most people, since war is our race's most popular diversion, one which gives purpose and color to dull and stupid lives. But it is a great boon to the intelligent man who fights only when he must-never for sport.

Work is not an end in itself; there must always be time enough for love.

There are only five things really worth drawing; four of them are pretty girls and the fifth is cats.

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

Once upon a time there was a Martian named Valentine Michael Smith.