“In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.”

God is known by nature in his works, and by doctrine in his revealed word.

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.

I’ve loved the stars too fondly to be fearful of the night.

The greatest wisdom is to get to know oneself.

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

Mathematics is the key and door to the sciences.

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.

Nature does not act by means of many things when it can do so by means of a few.

It is a beautiful and delightful sight to behold the body of the Moon.

The deeper I go in considering the vanities of popular reasoning, the lighter and more foolish I find them.

Passion is the genesis of genius.

Earth, turning upon itself, moves round the Sun.

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

You cannot teach a man anything, you can only help him find it within himself.

All truths are easy to understand once they are discovered; the point is to discover them.

Two truths cannot contradict one another.

Indeed, organizing atheists has been compared to herding cats, because they tend to think independently and will not conform to authority.

It is dangerous to be right in matters on which the established authorities are wrong.

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.

Leave no authority existing not responsible to the people.

Arguments from authority carry little weight, authorities have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.

Authority founded on injustice is never of long duration.

Always acknowledge a fault. This will throw those in authority off their guard and give you an opportunity to commit more.

Always acknowledge a fault. This will throw those in authority off their guard and give you an opportunity to commit more.