Mathematics is the key and door to the sciences. — Galileo Galilei

Science proceeds more by what it has learned to ignore than what it takes into account. — Galileo Galilei

In the future, there will be opened a gateway and a road to a large and excellent science into which minds more piercing than mine shall penetrate to recesses still deeper. — Galileo Galilei

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

I believe that the intention of Holy Writ was to persuade men of the truths necessary to salvation; such as neither science nor other means could render credible, but only the voice of the Holy Spirit. — Galileo Galilei

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

See now the power of truth. — Galileo Galilei

Scripture is a book about going to Heaven. It’s not a book about how the heavens go. — Galileo Galilei

Nature’s great book is written in mathematics. — Galileo Galilei

The book of nature is written in the language of mathematics. — Galileo Galilei

Philosophy is written in that great book which ever lies before our eyes–I mean the universe–but we cannot understand it if we do not first learn the language and grasp the symbols, in which it is written. — Galileo Galilei

He who looks the higher is the more highly distinguished, and turning over the great book of nature (which is the proper object of philosophy) is the way to elevate one’s gaze. — Galileo Galilei

I do not know what to say in a case so surprising, so unlooked for and so novel. — Galileo Galilei

There are those who reason well, but they are greatly outnumbered by those who reason badly. — Galileo Galilei

Where the senses fail us, reason must step in. — Galileo Galilei

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. — Galileo Galilei

To me, a great ineptitude exists on the part of those who would have it that God made the universe more in proportion to the small capacity of their reason than to His immense, His infinite, power. — Galileo Galilei

Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not. — Galileo Galilei

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. — Galileo Galilei

Nature . . . is inexorable and immutable; she never transgresses the laws imposed upon her, nor cares a whit whether her abstruse reasons and methods of operations are understandable to men. — Galileo Galilei

You cannot teach a person something he does not already know, you can only bring what he does know to his awareness. — Galileo Galilei

You can’t teach anybody anything, only make them realize the answers are already inside them. — Galileo Galilei

You cannot teach a man anything; you can only help him find it within himself. — Galileo Galilei

I would say here something that was heard from an ecclesiastic of the most eminent degree: The intention of the Holy Spirit is to teach us how one goes to heaven, not how the heavens go. — Galileo Galilei

Holy Writ was intended to teach men how to go to Heaven not how the heavens go. — Galileo Galilei

It was granted to me alone to discover all the new phenomena in the sky and nothing to anybody else. This is the truth which neither envy nor malice can supress. — Galileo Galilei

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

Nothing can be taught to a man, only it’s possibly to help him to discover it inside. — Galileo Galilei

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

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

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. — Galileo Galilei

They know that it is human nature to take up causes whereby a man may oppress his neighbor, no matter how unjustly. — Galileo Galilei

The greatest wisdom is to get to know oneself. — Galileo Galilei

The nature of the human mind is such that unless it is stimulated by images of things acting upon it from without, all remembrance of them passes easily away. — Galileo Galilei

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

Nothing occurs contrary to nature except the impossible, and that never occurs. — Galileo Galilei

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