| 4111 | Socrates believed that basically there is only one virtue, the power of right judgement [Socrates, by Williams,B] |
| 277 | The Guardians must aim to discover the common element in the four cardinal virtues [Plato] |
| 1916 | Even if virtues are many and various, they must have something in common to make them virtues [Plato] |
| 1918 | How can you know part of virtue without knowing the whole? [Plato] |
| 2155 | True goodness requires mental unity and harmony [Plato] |
| 4117 | Nowadays we (unlike Aristotle) seem agreed that someone can have one virtue but lack others [Williams,B on Aristotle] |
| 23910 | Greatness of soul produces all the virtues - and vice versa [Aristotle] |
| 13561 | Virtue is always moderate, so excess need not be feared [Seneca] |
| 5759 | Varied aims cannot be good because they differ, but only become good when they unify [Boethius] |
| 17221 | A man ignorant of himself is ignorant of all of the virtues [Spinoza] |
| 21418 | There is one principle of virtues; the virtues are distinguished by their objects [Kant] |
| 24103 | You should not want too many virtues; one is enough [Nietzsche] |
| 22346 | Moral reflection and experience gradually reveals unity in the moral world [Murdoch] |
| 22350 | Only trivial virtues can be possessed on their own [Murdoch] |
| 22456 | Maybe virtues conflict with each other, if some virtue needs a vice for its achievement [Foot] |
| 20213 | We need phronesis to coordinate our virtues [Zagzebski] |
| 4354 | Maybe in a deeply poisoned character none of their milder character traits could ever be a virtue [Hursthouse] |
| 4356 | We are puzzled by a person who can show an exceptional virtue and also behave very badly [Hursthouse] |
| 4364 | Being unusually virtuous in some areas may entail being less virtuous in others [Hursthouse] |