The man who views the world at 50 the same as he did at 20 has wasted 30 years of his life.

It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.

It was a book to kill time for those who like it better dead.

The good people sleep much better at night than the bad people. Of course, the bad people enjoy the waking hours much more.

I took a speed-reading course and read War and Peace in twenty minutes. It involves Russia.

More than any time in history mankind faces a crossroads. One path leads to despair and utter hopelessness, the other to total extinction. Let us pray that we have the wisdom to choose correctly.

Interestingly, according to modern astronomers, space is finite. This is a very comforting thought---particularly for people who can never remember where they have left things.

Our lives improve only when we take chances -- and the first and most difficult risk we can take is to be honest with ourselves.

From what we get, we can make a living; what we give, however, makes a life.

The three fundamental Rules of Robotics...One: a robot may not injure a human being, or, through inaction, allow a human being to come to harm...Two:..a robot must obey the orders given it by human beings except where such orders would conflict with the First Law...Three: a robot must protect its own existence as long as such protection does not conflict with the First and Second Laws.

The ability to delude yourself may be an important survival tool.

You white people are so strange. We think it is very primitive for a child to have only two parents.

The greatest pleasure in life is doing what people say you cannot do.

Television is the first truly democratic culture -- the first culture available to everybody and entirely governed by what the people want. The most terrifying thing is what people do want.

Consider the postage stamp: its usefulness consists in the ability to stick to one thing till it gets there.

Never express yourself more clearly than you are able to think.

The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.

For most folks, no news is good news; for the press, good news is not news.

Laughter is the shortest distance between two people.

Feeding the starving poor only increases their number.