May have attended Schelling's lectures at the same time as Søren Kierkegaard.

Scott Alexander on Marx:

I know that “capitalists sometimes do bad things” isn’t exactly an original talking point. But I do want to stress how it’s not equivalent to “capitalists are greedy”. I mean, sometimes they are greedy. But other times they’re just in a sufficiently intense competition where anyone who doesn’t do it will be outcompeted and replaced by people who do. Business practices are set by Moloch, no one else has any choice in the matter.

(from my very little knowledge of Marx, he understands this very very well and people who summarize him as “capitalists are greedy” are doing him a disservice)

Wanted to show that God had created the heavenly bodies according to a regular, beautiful, symmetric design. Went through the observations of Tycho Brahe, postulated an increasing number of circles in Mars' orbit, until he had got it down – but it was a complicated theory. There were small errors ascribable to measurement, and thankfully Kepler did not want to believe that Brahe had measured imperfectly, so he kept working until in desperation he postulated an elliptical orbit. This fit perfectly!

Before, everyone assumed the orbits were circles – even if you had to give the planets many different circular orbits they could be in at different times. Shaping it as an ellipse enabled there to be only one orbit. But few people took such a thing as an elliptical orbit seriously – it seemed too imperfect for heavenly bodies.

He explained the elliptical orbit to Galileo himself, who rejected it. Now we accept it as Kepler's First Law.

• Kepler's First Law: The orbit of any planet is elliptical. They can be almost circular, but never perfectly circular.
• Kepler's Second Law: planets move fastest when they are closest to the sun, and slower when far away.
• Kepler's Third Law: The time for an orbit increases the further the planet is from the sun.

Famous for cryptic and paradoxical utterances. Exalted the logos as a cosmic power and identified fire as the primal substance, whereas Thales of Miletus had identified water. Later, Empedocles (490–430 BCE) subsumed both views.