Johannes Kepler's life and work has prompted lots of interest from not only the fields of mathematics and science but also of theology and faith. See a range quotes about Kepler by a variety of people throughout the ages.

the astrologer who killed astrology
Owen Gingerich

The first astrophysicist and the last scientific astrologer.
Carl Sagan

Fiercely competitive and prone to a certain amount of quarrelsomeness and violence.
Albert Koestler

One of the first modern astronomers and last scientific astrologers.
Carl Sagan

Kepler became interested in the action of the moon on the water, and in other occult phenomena, and similar childishness.
Galileo Galilei

"Kepler was visited by a revelation that was to alter radically the future of astronomy.
Carl Sagan

One wonders how many modern scientists faced by a similar situation in their work would fail to be impressed by such remarkable numerical coincidences.
Fred Hoyle

Among the great men who have philosophized about the tides, the one who surprised me most is Kepler. He was a person of independent genius.
Galileo Galilei

It is important that in Kepler's view the anima terrae is responsible for the weather and also for meteoric phenomena. Too much rain, for instance, is an illness of the earth.
Wolfgang Pauli

A law explains a set of observations; a theory explains a set of laws. The quintessential illustration of this jump in level is the way in which Newton’s theory of mechanics explained Kepler’s law of planetary motion.
John L Casti

Kepler was a brilliant thinker and a lucid writer, but he was a disaster as a classroom teacher. He mumbled. He digressed. He was at times utterly incomprehensible. He drew only a handful of students his first year at Graz; the next year there were none.
Carl Sagan