Kepler on the Application of Science

Johannes Kepler, anonymous portrait (1627)

Truthfully I may confess that as often as I contemplate the proper order, as one results from another and becomes diminished, it is as if I have read a heavenly passage not written in meaningful letters but with the essential things in this world which tells me: Put your reason herein to comprehend these things.

–Johannes Kepler, Journal entry from 1604 (J.A. Connor transl.)