I believe any malevolent supercivilisation would have rapidly self-destructed as we may be in the process of doing ourselves. If we do have contact, physical contact with aliens, I think it will be benign.
Arthur C. ClarkeWe seldom stop to think that we are still creatures of the sea, able to leave it only because, from birth to death, we wear the water-filled space suits of our skins.
Arthur C. ClarkeIf an elderly but distinguished scientist says that something is possible, he is almost certainly right; but if he says that it is impossible, he is very probably wrong.
Arthur C. ClarkeGood morning, doctors. I have taken the liberty of removing Windows 95 from my hard drive.
Arthur C. Clarke