5 ideas
13197 | The notion of substance is one of the keys to true philosophy [Leibniz] |
579 | Cratylus said you couldn't even step into the same river once [Cratylus, by Aristotle] |
578 | Cratylus decided speech was hopeless, and his only expression was the movement of a finger [Cratylus, by Aristotle] |
13198 | Gravity is within matter because of its structure, and it can be explained. [Leibniz] |
5470 | The idea of laws of nature arose in the Middle Ages [Hall,AR, by Ellis] |