5 ideas
13197 | The notion of substance is one of the keys to true philosophy [Leibniz] |
21799 | We just use the word 'faculty' when we don't know the psychological cause [Galen] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
13198 | Gravity is within matter because of its structure, and it can be explained. [Leibniz] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |