4 ideas
10180 | Mathematicians do not study objects, but relations between objects [Poincaré] |
3284 | There is no one theory of how to act (or what to believe) [Nagel] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |