A quote
There you have its outward appearance, if it should ever come under a single view and show itself once in all its completeness. But there are many aspects of it. They unfold themselves according as life varies and as actions differ; but virtue itself does not become less or greater. For the Supreme Good cannot diminish, nor may virtue retrograde; rather is it transformed, now into one quality and now into another, shaping itself according to the part which it is to play.
Seneca·Letter 66 — On Various Aspects of Virtue (§7)·trans. Gummere