Our prime purpose in this life is to help others. And if you can't help them, at least don't hurt them.

No testimony is sufficient to establish a miracle, unless the testimony be of such a kind, that its falsehood would be more miraculous than the fact which it endeavors to establish.

There are moments when all anxiety and stated toil are becalmed in the infinite leisure and repose of nature.

In this world there is always danger for those who are afraid of it.

The world is very different now. For man holds in his mortal hands the power to abolish all forms of human poverty, and all forms of human life.