4 ideas
8920 | Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
4422 | The end need not be the goal, as in the playing of a melody (and yet it must be completed) [Nietzsche] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |