18 ideas
| 1542 | Diogenes of Apollonia was the last natural scientist [Diogenes of Apollonia, by Simplicius] |
| 489 | Each thing must be in some way unique [Diogenes of Apollonia] |
| 483 | Start a thesis with something undisputable [Diogenes of Apollonia] |
| 1544 | Perception must be an internal matter, because we can fail to perceive when we are preoccupied [Diogenes of Apollonia, by Theophrastus] |
| 24042 | The older Diogenes said the soul is air, made of the smallest particles [Diogenes of Apollonia] |
| 23146 | Motives produce intentions, which lead to actions [Driver] |
| 23147 | Good intentions are not necessary for virtue [Driver] |
| 23144 | Virtue should be defined by consequences, not by states of mind [Driver] |
| 23148 | Virtues are character traits or dispositions which produce good consequences for others [Driver] |
| 23150 | Control of pregnancy and knowledge of paternity have downgraded chastity [Driver] |
| 23149 | If generosity systematically turned recipients into parasites, it wouldn't be a virtue [Driver] |
| 13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
| 5995 | Diogenes of Apollonia offered the first teleological account of cosmology [Diogenes of Apollonia, by Robinson,TM] |
| 488 | Air is divine, because it is in and around everything, and arranges everything [Diogenes of Apollonia] |
| 484 | Everything is ultimately a variation of one underlying thing [Diogenes of Apollonia] |
| 486 | Plants and animals can only come into existence if something fixes their species [Diogenes of Apollonia] |
| 485 | Things must retain their essential nature during change, or mixing would be impossible [Diogenes of Apollonia] |
| 20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |