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

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.

I am certainly interested in a tribunal in which, for having used my reason, I was deemed little less than a heretic.

In time you may discover everything that can be discovered, and still your progress will only be progress away from humanity.

That sculpture is more admirable than painting for the reason that it contains relief and painting does not is completely false.

See now the power of truth; the same experiment which at first glance seemed to show one thing, when more carefully examined, assures us of the contrary.

The Divine intellect indeed knows infinitely more propositions.

This Old Testament – containing error, folly, absurdity and immorality – is by English statute law declared to be of divine authority, a blasphemy – if there were anyone to be blasphemed – blacker and more insolent than any word ever written or penned by the most hotheaded Freethinker.

All my authority in heaven and on earth has been given to me.

Each person is oriented toward a quest for his personal invisible guide, or he entrusts himself to the collective, magisterial authority as the intermediary between himself and Revelation.

Engage with the Bible. Meditate on it day and night. Think and rethink about God’s Word. Let it be your guide. Make it your go-to book for questions. Let it be the ultimate authority in your life.

There is no power or authority without responsibility, and he who accepts the one cannot escape or evade the other.

Rulers who destroy men’s freedom commonly begin by trying to retain its forms. … They cherish the illusion that they can combine the prerogatives of absolute power with the moral authority that comes from popular assent.

Comrade Stalin, having become Secretary-General, has unlimited authority concentrated in his hands, and I am not sure whether he will always be capable of using that authority with sufficient caution.

Authority poisons everybody who takes authority on himself.