All human advances occur in the outlaw area.

Now there is one outstanding important fact regarding spaceship earth, and that is that no instruction book came with it.

Truth is the progressive diminution of residual error.

Man knows so much and does so little.

You can rest assured that if you devote your time and attention to the highest advantage of others, the Universe will support you, always and only in the nick of time.

The word generalization in literature usually means covering too much territory too thinly to be persuasive, let alone convincing. In science, however, a generalization means a principle that has been found to hold true in every special case.... The principle of leverage is a scientific generalization.

Our beds are empty two-thirds of the time. Our living rooms are empty seven-eighths of the time. Our office buildings are empty one-half of the time. It's time we gave this some thought.