Galileo Galilei

"To unlock nature's secrets, one must ask the right questions."

"Hope is the anchor of the soul in stormy seas."

"The pursuit of understanding is the highest calling of humanity."

"What lies behind us and what lies before us are tiny matters compared to what lies within us."

"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."

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

"Passion is the genesis of genius."

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

"The book of nature is written in the language of mathematics."

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

"Measure what is measurable, and make measurable what is not so."

"We have more to fear from the fox than from the lion."

"It is a beautiful and wondrous thing to contemplate the heavens."

"The greatest truths are the simplest things in the world, simple as your own breath."

"A man who is not willing to be fools has lost his curiosity."

"If I were again beginning my studies, I would follow the advice of Plato and start with mathematics."

"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 laws of nature are written by the hand of God in the language of mathematics."

"Doubt is the key to knowledge."

"To understand the universe, you must know the language in which it is written."

"We should not impose unnecessary entities upon nature."

"Nothing is so strong as gentleness, nothing so gentle as real strength."

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

"Knowing thyself is the beginning of all wisdom."

"The human understanding is faltered by taking too narrow and too philosophical a view of nature."

"In my studies of astronomy and physics, I have always found that the simplest explanation is usually the correct one."

"Who can set bounds to the enterprises of man?"

"Two truths cannot contradict one another."

"The telescope, that admirable invention, has opened to our gaze worlds previously unseen."