Analysis of A Triad

Three sang of love together: one with lips
   Crimson, with cheeks and bosom in a glow,
Flushed to the yellow hair and finger tips;
   And one there sang who soft and smooth as snow
   Bloomed like a tinted hyacinth at a show;
And one was blue with famine after love,
   Who like a harpstring snapped rang harsh and low
The burden of what those were singing of.
One shamed herself in love; one temperately
   Grew gross in soulless love, a sluggish wife;
One famished died for love. Thus two of three
   Took death for love and won him after strife;
One droned in sweetness like a fattened bee:
   All on the threshold, yet all short of life.