Time travel may be possible, but it is not practical.

We don't let animals suffer, so why humans?

The human failing I would most like to correct is aggression.

If at first you don't succeed, try management.

We are all different. There is no such thing as a standard or run-of-the-mill human being, but we share the same human spirit.

Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory.

We believe human begins have existed for only a small fraction of cosmic history, because human race has been improving so rapidly in knowledge and technology that if people had been around for millions of years, the human race would be much further along in it's mastery.