5 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 22352 | Out of more than a hundred planets, Earth is the only one with the idea of free will [Vonnegut] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |
| 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] |