Galileo Galilei

"In the pursuit of knowledge, we must sometimes endure loneliness."

"The greatest gift is not just knowledge, but the desire for knowledge."

"You cannot force the mind to believe; you can only present it with evidence."

"The skeptic who will not look through the telescope is more foolish than the fool who cannot."

"I have discovered nothing; I have merely unveiled what God has already written in nature."

"To understand one thing, you must often understand many other things first."

"The pursuit of truth and beauty is a sphere of activity in which we are allowed to remain children all our lives."

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

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

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

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

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

"Passion is the genesis of genius."

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

"The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if its sole concern were a bunch of grapes."

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

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

"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."

"The mistakes of our youth teach us the lessons of our age."

"Nothing is so powerful as an idea whose time has come."

"You cannot teach people anything. You can only help them find it within themselves."

"Dare to know. Use your own understanding."

"The universe is a grand book written in the language of mathematics."

"Where the evidence leads, I shall follow."

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

"The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function."

"We have seen Venus to be very like the moon, and the moon very like Venus, both having illuminated parts on the side toward the sun."

"Imagination is more important than knowledge."

"It is a mathematical fact that the casting of this pebble from my hand has a necessary effect upon the universe - it is in the chain of cause and effect."

"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."