6 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 16541 | All the intrinsic properties of a thing should be deducible from its definition [Spinoza] |
| 13073 | To understand the properties we must know the essence, as with a circle [Spinoza] |
| 5987 | Alcmaeon was the first to say the brain is central to thinking [Alcmaeon, by Staden, von] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |
| 24043 | Soul must be immortal, since it continually moves, like the heavens [Alcmaeon, by Aristotle] |