4 ideas
| 12733 | Because of the definitions of cause, effect and power, cause and effect have the same power [Leibniz] |
| 12734 | Every necessary proposition is demonstrable to someone who understands [Leibniz] |
| 5845 | Niceratus learnt the whole of Homer by heart, as a guide to goodness [Xenophon] |
| 16746 | Principles of things are not hidden features of forms, but the laws by which they were formed [Newton] |