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Galileo Galilei

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.

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

But of all other stupendous inventions, what sublimity of mind must have been his who conceived how to communicate his most secret thoughts to any other person, though very far distant, either in time or place? And with no greater difficulty than the various arrangement of two dozen little signs upon paper? Let this be the seal of all the admirable inventions of man.

By denying scientific principles, one may maintain any paradox.

Doubt is the father of invention.

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

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

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

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

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

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

The Bible shows the way to go to heaven, not the way the heavens go.

The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the Universe to do.

Where the senses fail us, reason must step in.

You cannot teach a man anything; you can only help him discover it in himself.

Quotes by Galileo Galilei

Galileo Galilei

Galileo Galilei

1564 to 1642

Italian physicist, astronomer, and philosopher