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In 1584, twenty-five years before Galileo lifted a telescope, Bruno took the Copernican hypothesis to the outrageous new conclusion that the sun is merely one of an infinity of stars, which stretch across boundless and inexhaustible space. It was consummate audacity to proclaim an infinite universe in the teeth of the doctrinal dogfights of the 16th century. It was yet bolder to exult in the de immenso with the bounding wonder of a poet. The prospect of our earth reduced to a turning speck in endless space was terrifying to contemplate. An ecstatic Bruno cried, 'My thoughts are stitched to the stars!' and contemplated little else. With an impetuous abandon that his contemporaries found reckless and even dangerous, Bruno proceeded to rethink man's relationship to the universe, to himself, and to God by the unimaginable light of countless stars. His conclusions were simply unbelievable for a late medieval mind: infinite other worlds, inhabited like our own, spread throughout space; a structure to the universe of suns and clusters of suns circling in grand orbits, but no 'center' except in the ground beneath two human feet; the presence of God not atop an empyrean throne past the threshold of the farthest stars, but inhabiting every atom of matter; an eternal span to matter, which can change its form but never be exhausted in any proportion; and finally a logic infinity demanded of him - an innate union of all contraries, by which evil and good, history and the future, localized humanity and an infinite universe inform and express one another...

Giordano Bruno#60

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About this quote

What does it mean?
Giordano Bruno boldly expanded the Copernican hypothesis to propose an infinite universe long before the telescope.
In plain terms
Bruno said the universe is infinite and full of stars before others believed it.
What can you take from it?
Scientific progress often requires imagining the impossible.

Where it applies

  • Science history
  • Philosophy of science
  • Astronomy

Putting it to work

  • Studying scientific history
  • Exploring cosmic concepts

Questions to consider

  • Why do new ideas threaten established views?
  • How does poetry aid scientific discovery?

Another view

The quote calls the hypothesis audacious but does not explain the specific doctrinal conflicts of the 16th century.

More from Giordano Bruno

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  3. Joyce gives the ghost guises like Saint Bruno and The Nolan of the Cabashes and Noland's brown and Nolan Browne and Bruno Nowlan and Nolans Brumans and Mr. Bro…

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