4 ideas
| 23221 | The brain, and all the mental events within it, consists entirely of sensitive and rational matter [Cavendish] |
| 13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
| 13097 | Force in substance makes state follow state, and ensures the very existence of substance [Leibniz] |
| 20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |