In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.
Facts which at first seem improbable will, even on scant explanation, drop the cloak which has hidden them and stand forth in naked and simple beauty.
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.
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.
All truths are easy to understand once they are discovered; the point is to discover them.
I have never met a man so ignorant that I couldn't learn something from him.
The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the Universe to do.
You cannot teach a man anything; you can only help him discover it in himself.
Doubt is the father of invention.