The abundance, the solidity, and the splendor of the results already achieved by science are well fitted to inspire us with a cheerful confidence in the soundness of its method.

By religion, then, I understand a propitiation or conciliation of powers superior to man which are believed to direct and control the course of nature and of human life.

The custom of burning a beneficent god is too foreign to later modes of thought to escape misinterpretation.

Small minds cannot grasp great ideas; to their narrow comprehension, their purblind vision, nothing seems really great and important but themselves.

The second principle of magic: things which have once been in contact with each other continue to act on each other at a distance after the physical contact has been severed.

The advance of knowledge is an infinite progression towards a goal that ever recedes.

In point of fact magicians appear to have often developed into chiefs and kings.

It is a common rule with primitive people not to waken a sleeper, because his soul is away and might not have time to get back.

The question whether our conscious personality survives after death has been answered by almost all races of men in the affirmative.

The slow, the never ending approach to truth consists in perpetually forming and testing hypotheses, accepting those at which at the time seem to fit the facts and rejecting the others.

The man of science, like the man of letters, is too apt to view mankind only in the abstract, selecting in his consideration only a single side of our complex and many-sided being.

The strength of spirit is measured by sufferings.

Start every morning by drinking a cup of love, and you will enjoy the day and love everyone.

One learns by doing, not by learning to do.

Your father died for me, and dying with you would be an honor, though not as great as dying to save you.

Being able to ‘think out of the box’ presupposes you were able to think in it.

I will build a great, great wall on our southern border. And I will have Mexico pay for that wall.

Kitchen Physic is the best Physic.

I don't know when I'm going to have time to be politically active.

If you work in Chicago in the improv scene, anyone is happy for you if you get a job.

But I think my mistakes became the chemistry for my miracles. I think that my tests became my testimonies.