Because it is a background virtue, humility (derived from the Latin for ‘low’) is best described in terms of what it isn’t. It isn’t ambitious, holds no opinions, declines to judge, has no enemies, does nothing unnecessarily, is unconcerned with image, doesn’t need notes.
The virtues are an absence before they are a presence. Courage is the absence of fear, innocence of lust, humility of pride. And what is this purifying fecundity, this mothering absence? Love, actually.