10 ideas
| 9271 | Human knowledge may not produce well-being; the examined life may not be worth living [Gray] |
| 9275 | Knowledge does not need minds or nervous systems; it is found in all living things [Gray] |
| 13165 | Geometrical proofs do not show causes, as when we prove a triangle contains two right angles [Proclus] |
| 9276 | The will hardly ever does anything; most of our life just happens to us [Gray] |
| 9569 | The origin of geometry started in sensation, then moved to calculation, and then to reason [Proclus] |
| 468 | Musical performance can reveal a range of virtues [Damon of Ath.] |
| 9278 | Nowadays we identify the free life with the good life [Gray] |
| 9280 | Over forty percent of the Earth's living tissue is human [Gray] |
| 9272 | Without Christianity we lose the idea that human history has a meaning [Gray] |
| 9279 | What was our original sin, and how could Christ's suffering redeem it? [Gray] |