Enigma with Flower

Victory. It has come late, I had not learnt
how to arrive, like the lily, at will,
the white figure, that pierces
the motionless eternity of earth,
pushing at clear, faint, form,
till the hour strikes: that clay,
with a white ray, or a spur of milk.
Shedding of clothing, the thick darkness of soil,
on whose cliff the fair flower advances,
till the flag of its whiteness
defeats the contemptible deep of night,
and, from the motion of light,
spills itself in astonished seed.