Morning that comes but once — Eclipse

Morning that comes but once, ¹
Considers coming twice－
Two Dawns upon a single Morn,
Make Life a sudden price.

(F.1645/J.1610)

[1] Morning:: the beginning of life, hinted in line four.
[2] coming twice:: coming from mother's womb twice.
[3] two Dawns:: one as woman, one as man.
[4] sudden price:: something unexpected and additional to the normal people.