Science is organized knowledge. Wisdom is organized life.

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

The product of mental labor - science - always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.

Science must have originated in the feeling that something was wrong.

This world, after all our science and sciences, is still a miracle wonderful, inscrutable, magical and more, to whosoever will think of it.