“Discover the force of the heavens O Men:
Once recognised it can be put to use:
No use could be seen in unknown things.”

—  Johannes Kepler

De fundamentis astrologiae certioribus [On the more Certain Fundamentals of Astrology or On Giving Astrology Sounder Foundations] (written 1601; published 1602) in Opera Omnia, Vol. 1, Heyder & Zimmer, 1858, p. 417 (title-page)

Original

Vim coeli reserate viri: venit agnita ad usus: Ignotae videas commoda nulla rei.

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Johannes Kepler photo
Johannes Kepler 51
German mathematician, astronomer and astrologer 1571–1630

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