Finished products are for decadent minds.

People who think they know everything are a great annoyance to those of us who do.

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.

When stupidity is considered patriotism, it is unsafe to be intelligent.

So the universe is not quite as you thought it was. You'd better rearrange your beliefs, then. Because you certainly can't rearrange the universe.

In life, unlike chess, the game continues after checkmate.

People think of education as something that they can finish.

There are no nations! There is only humanity. And if we don't come to understand that right soon, there will be no nations, because there will be no humanity.

A robot may not injure a human being, or, through inaction, allow a human being to come to harm.

Violence is the last refuge of the incompetent.

A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

If I told you that I imagine love to be a two-way mirror, which side of the mirror would you imagine me standing on?

Fortune does favor the bold and you'll never know what you're capable of if you don't try.

The reason we can say anything we want in America is that we know it makes no difference.

There is a very real relationship, both quantitatively and qualitatively, between what you contribute and what you get out of this world.

When no one loves you, you have to pretend that everyone loves you.

People who talk only of themselves think only of themselves.

And then adds with a laugh, 'but in retrospect I think he may have been more sophisticated than we were.'

Memory is a net: one that finds it full of fish when he takes it from the brook, but a dozen miles of water have run through it without sticking.

Does a name stick because it suits a man or does the man, unconsciously, evolve into his name?

Just because you’re on their side doesn’t mean they’re on your side.