Any technology distinguishable from magic is insufficiently advanced.

Now I understand,” said the last man.

Floyd could imagine a dozen things that could go wrong; it was little consolation that it was always the thirteenth that actually happened.

If there are any gods whose chief concern is man, they can't be very important gods.

The difference between machines and human beings is that human beings can be reproduced by unskilled labour.

It was a pity that there was no radar to guide one across the trackless seas of life. Every man had to find his own way, steered by some secret compass of the soul. And sometimes, late or early, the compass lost its power and spun aimlessly on its bearings. Alan Bishop

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.