I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.

It vexes me when they would constrain science by the authority of the Scriptures, and yet do not consider themselves bound to answer reason and experiment.

We cannot teach people anything; we can only help them discover it within themselves.

I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.

Where the senses fail us, reason must step in.

I have never met a man so ignorant that I couldn't learn something from him.