4 ideas
| 579 | Cratylus said you couldn't even step into the same river once [Cratylus, by Aristotle] |
| 578 | Cratylus decided speech was hopeless, and his only expression was the movement of a finger [Cratylus, by Aristotle] |
| 4871 | A thing is free if it acts only by the necessity of its own nature [Spinoza] |
| 9145 | We form the image of a cardinal number by a double abstraction, from the elements and from their order [Cantor] |