The mind, in proportion as it is cut off from free communication with nature, with revelation, with God, with itself, loses its life, just as the body droops when debarred from the air and the cheering light from heaven. – William Channing
Time travel used to be thought of as just science fiction, but Einsteins 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. – Stephen Hawking