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.
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.
The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.
All truths are easy to understand once they are discovered; the point is to discover them.
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.
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.
It is surely harmful to souls to make it a heresy to believe what is proved.
Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.
I give infinite thanks to God, who has been pleased to make me the first observer of marvelous things.
If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.
Measure what is measurable, and make measurable what is not so.
And yet it moves.
We must say that there are as many squares as there are numbers.