3 ideas
| 22352 | Out of more than a hundred planets, Earth is the only one with the idea of free will [Vonnegut] |
| 6004 | The cardinal virtues are theoretical (based on knowledge), and others are 'non-theoretical' [Hecato, by Dorandi] |
| 14014 | Space alone, and time alone, will fade away, and only their union has an independent reality [Minkowski] |