I, Robot / Я, робот

To you, a robot is a robot. Gears and metal; electricity and positrons. —Mind and iron! Human-made! If necessary, human-destroyed! But you haven’t worked with them, so you don’t know them. They’re a cleaner better breed than we are

The Master created humans first as the lowest type, most easily formed. Gradually, he replaced them by robots, the next higher step, and finally he created me, to take the place of the last humans

A robot may not injure a human being or, through inaction, allow a human being to come to harm.
A robot must obey orders given it by human beings except where such orders would conflict with the First Law.
A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.