Galileo Galilei quotes

Born
15 February 1564 Pisa, Duchy of Florence.

Died
8 January 1642.

Occupation
Natural philosophy to modern science.

Galileo Galilei was an Italian polymath. Galileo is a central figure in the transition from natural philosophy to modern science and in the transformation of the scientific Renaissance into a scientific revolution.

Measure what is measurable, and make measurable what is not so.
– Galileo Galilei
We cannot teach people anything; we can only help them discover it within themselves.
– Galileo Galilei
It is surely harmful to souls to make it a heresy to believe what is proved.
– Galileo Galilei
If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.
– Galileo Galilei
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
– Galileo Galilei
Who would set a limit to the mind of man? Who would dare assert that we know all there is to be known?
– Galileo Galilei
Where the senses fail us, reason must step in.
– 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
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.
– Galileo Galilei
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.
– 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
The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
– Galileo Galilei
And yet it moves.
– Galileo Galilei
I give infinite thanks to God, who has been pleased to make me the first observer of marvelous things.
– 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
We must say that there are as many squares as there are numbers.
– Galileo Galilei
All truths are easy to understand once they are discovered; the point is to discover them.
– Galileo Galilei
I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.
– Galileo Galilei
I have never met a man so ignorant that I couldn’t learn something from him.
– Galileo Galilei
The Bible shows the way to go to heaven, not the way the heavens go.
– Galileo Galilei
By denying scientific principles, one may maintain any paradox.
– Galileo Galilei