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Philosophy is written in this grand book, the universe, which stands continually open to our gaze.

Galileo Galilei

It is surely harmful to souls to make it a heresy to believe what is proved.
GALILEO GALILEI

Believe Harm Prove Science Soul
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

Acting Human Mind Nature Remember
I do not know what to say in a case so surprising, so unlooked for and so novel.
GALILEO GALILEI

Case Heaven Look Surprise
Long experience has taught me this about the status of mankind with regard to matters requiring thought.
GALILEO GALILEI

Experience Mankind Matter Regard Requirement Status Teaching
Wine is sunlight, held together by water.
GALILEO GALILEI

Alcohol Sunlight Togetherness Water Wine
Mathematics is the key and door to the sciences.
GALILEO GALILEI

Door Key Mathematics Science
See now the power of truth; the same experiment which at first glance seemed to show one thing, when more carefully examined, assures us of the contrary.
GALILEO GALILEI

Assure Care Contrary Experiement Glance Power Show Truth
It is a beautiful and delightful sight to behold the body of the Moon.
GALILEO GALILEI

Beautiful Body Delight Moon Sight
I believe that the intention of Holy Writ was to persuade men of the truths necessary to salvation; such as neither science nor other means could render credible, but only the voice of the Holy Spirit.
GALILEO GALILEI

Believe Holy Intention Men Necessary Salve Science Spirit Truth
Two truths cannot contradict one another.
GALILEO GALILEI

Contradict One Liner Truth
In my studies of astronomy and philosophy I hold this opinion about the universe, that the Sun remains fixed in the centre of the circle of heavenly bodies, without changing its place; and the Earth, turning upon itself, moves round the Sun.
GALILEO GALILEI

Astronomy Earth Opinion Philosophy Round Science Study Sun Universe
Holy Writ was intended to teach men how to go to Heaven not how the heavens go.
GALILEO GALILEI

Heaven Holy Intend Teaching
In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.
GALILEO GALILEI

Authority Individual Man Opinion Reason Science Spark Worth
The increase of known truths stimulates the investigation, establishment, and growth of the arts.
GALILEO GALILEI

Art Establishment Growth Increase Investigation Truth
To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement ‘I do not know’.
GALILEO GALILEI

Modest Statement Wise
We see only the simple motion of descent, since that other circular one common to the Earth, the tower, and ourselves remains imperceptible.
GALILEO GALILEI

Descent Earth Motion Science

Philosophy is written in this grand book, the universe, which stands continually open to our gaze.

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Philosophy is written in this grand book, the universe, which stands continually open to our gaze.

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