Yet in this my stars were not Mercury as morning star in the angle of the seventh house, in quartile with Mars, but they were Copernicus, they were Tycho Brahe, without whose books of observations everything which has now been brought by me into the brightest daylight would lie buried in darkness.

Harmonice Mundi, The Harmony of the World (1619), book IV, Epilogue on Sublunary Nature. Trans. E. J. Aiton, A. M. Duncan, and J. V. Field (1997)