Frasi di Giovanni Keplero

Giovanni Keplero photo
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Giovanni Keplero

Data di nascita: 27. Dicembre 1571
Data di morte: 15. Novembre 1630

Pubblicità

Giovanni Keplero fu un astronomo, matematico, musicista e teologo evangelico tedesco, che scoprì empiricamente le omonime leggi che regolano il movimento dei pianeti.

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Frasi Giovanni Keplero

Pubblicità
Pubblicità

„I am indeed casting the die and writing the book, either for my contemporaries or for posterity to read, it matters not which: let the book await its reader for a hundred years; God himself has waited six thousand years for his work to be seen.“

—  Johannes Kepler
Context: Now because 18 months ago the first dawn, 3 months ago broad daylight but a very few days ago the full sun of the most highly remarkable spectacle has risen — nothing holds me back. I can give myself up to the sacred frenzy, I can have the insolence to make a full confession to mortal men that I have stolen the golden vessel of the Egyptians to make from them a tabernacle for my God far from the confines of the land of Egypt. If you forgive me I shall rejoice; if you are angry, I shall bear it; I am indeed casting the die and writing the book, either for my contemporaries or for posterity to read, it matters not which: let the book await its reader for a hundred years; God himself has waited six thousand years for his work to be seen. Book V, Introduction Variant translation: It may well wait a century for a reader, as God has waited six thousand years for an observer. As quoted in The Martyrs of Science; or, the Lives of Galileo, Tycho Brahe, and Kepler (1841) by David Brewster, p. 197. This has sometimes been misquoted as "It may be well to wait a century for a reader, as God has waited six thousand years for an observer." Variant translation: I feel carried away and possessed by an unutterable rapture over the divine spectacle of heavenly harmony... I write a book for the present time, or for posterity. It is all the same to me. It may wait a hundred years for its readers, as God has also waited six thousand years for an onlooker. As quoted in Calculus. Multivariable (2006) by Steven G. Krantz and Brian E. Blank. p. 126 Variant translation: I am stealing the golden vessels of the Egyptians to build a tabernacle to my God from them, far far away from the boundaries of Egypt. If you forgive me, I shall rejoice.; if you are enraged with me, I shall bear it. See, I cast the die, and I write the book. Whether it is to be read by the people of the present or of the future makes no difference: let it await its reader for a hundred years, if God himself has stood ready for six thousand years for one to study him. Unsourced translation

Pubblicità

„Nothing which consists of corporeal matter is absolutely light, but that is comparatively lighter which is rarer“

—  Johannes Kepler
Context: Nothing which consists of corporeal matter is absolutely light, but that is comparatively lighter which is rarer, either by its own nature, or by accidental heat. And it is not to be thought that light bodies are escaping to the surface of the universe while they are carried upwards, or that they are not attracted by the earth. They are attracted, but in a less degree, and so are driven outwards by the heavy bodies; which being done, they stop, and are kept by the earth in their own place. As quoted by Bryant, ibid.

„Just as the eye was made to see colours, and the ear to hear sounds, so the human mind was made to understand“

—  Johannes Kepler
Context: Just as the eye was made to see colours, and the ear to hear sounds, so the human mind was made to understand, not whatever you please, but quantity. I. 31 as quoted by Edwin Arthur Burtt in The Metaphysical Foundations of Modern Physical Science

„I was almost driven to madness in considering and calculating this matter. I could not find out why the planet would rather go on an elliptical orbit. Oh, ridiculous me!“

—  Johannes Kepler
Context: I was almost driven to madness in considering and calculating this matter. I could not find out why the planet would rather go on an elliptical orbit. Oh, ridiculous me! As the liberation in the diameter could not also be the way to the ellipse. So this notion brought me up short, that the ellipse exists because of the liberation. With reasoning derived from physical principles, agreeing with experience, there is no figure left for the orbit of the planet but a perfect ellipse. Ch.58, as quoted in John Freely, Before Galileo: The Birth of Modern Science in Medieval Europe (2012)

„I contemplate its beauty with incredible and ravishing delight“

—  Johannes Kepler
Context: I certainly know that I owe it [the Copernican theory] this duty, that as I have attested it as true in my deepest soul, and as I contemplate its beauty with incredible and ravishing delight, I should also publicly defend it to my readers with all the force at my command. Vol. VI, p. 116, Vol. VIII, p. 266ff.

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