Philip K. Dick, "Man, Android, and Machine" in The Shifting Realities of Philip K. Dick (Lawrence Sutin, ed.) page 211

Within the universe there exists fierce cold things, which I have given the name "machines" to. Their behavior frightens me, especially when it imitates human behavior so well that I get the uncomfortable sense that these things are trying to pass themselves off as humans but are not. I call them "androids," which is my own way of using that word. By "android" I do not mean a sincere attempt to create in the laboratory a human being... I mean a thing somehow generated to deceive us in a cruel way, to cause us to think it to be one of ourselves. Made in a laboratory--that aspect is not meaningful to me; the entire universe is one vast laboratory, and out of it come sly and cruel entities that smile as they reach out to shake hands. But their handshake is the grip of death, and their smile has the coldness of the grave.