4 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 13007 | Archimedes defined a straight line as the shortest distance between two points [Archimedes, by Leibniz] |
| 19423 | By an 'idea' I mean not an actual thought, but the resources we can draw on to think [Leibniz] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |