If you wish to reflect credit upon your parents, accomplish more than they did, solve problems that they could not understand, and build better than they knew.

We can conceive of eternity because we cannot conceive of a cessation of time. We can conceive of infinite space because we cannot conceive of so much matter that our imagination will not stand upon the farthest star and see infinite space beyond.

Let us account for all we see by the facts we know. If there are things for which we cannot account, let us wait for light.

Robert Green Ingersoll Quotes