Quotes by Isaac Asimov

Violence is the last refuge of the incompetent.

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 or Second Laws.

I do not fear computers. I fear the lack of them.