4 ideas
9548 | A mathematical object exists if there is no contradiction in its definition [Waterfield] |
5655 | Happiness is not satisfaction of desires, but fulfilment of values [Bradley, by Scruton] |
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] |