| Anaxagoras Quotes | 500 BC - 428 BC |
| Antisthenes Quotes | 444 BC - 371 BC |
| Aristotle Quotes | 384 BC - 322 BC |
| Democritus Quotes | 460 BC - 370 BC |
| Diogenes Quotes | 412 BC - 323 BC |
| Empedocles Quotes | 490 BC - 430 BC |
| Epictetus Quotes | 55 - 135 |
| Epicurus Quotes | 341 BC - 271 BC |
| Heraclitus Quotes | 544 BC - 483 BC |
| Hypatia Quotes | 350 - 415 |
| Plato Quotes | 427 BC - 347 BC |
| Plutarch Quotes | 46 - 120 |
| Protagoras Quotes | 481 BC - 411 BC |
| Diogenes of Sinope Quotes | 412 BC - 323 BC |
| Socrates Quotes | 469 BC - 399 BC |
| Thales Quotes | 624 BC - 546 BC |
| Theophrastus Quotes | 370 BC - 285 BC |
| Xenocrates Quotes | 396 BC - 314 BC |
| Xenophanes Quotes | 570 BC - 480 BC |
| Citium Zeno Quotes | 335 BC - 264 BC |
