Irresistible

"The Sons of God Saw the Daughters of Man that they were Fair"
Daniel Chester French (1923)

Image Credit: Lee Sandstead

Thinking about comparing things to Adam led me to this

Come, sleep! thou luxury to the happiest; thou matchless blessing to those that may not be comforted. Come deathlike; profound as Adam's first. Fated progenitor! Then from near thy soft heart, sprang its resistless enemy, evermore armed against the peace of thy unhappy sons! Nay, the very angels surrendered Heaven, and trembling, yielded to her arms.
(August 1852; and Scenes and Adventures in the Army)

which sounds something like this

All of us have monarchs and sages for kinsmen; nay, angels and archangels for cousins; since in antediluvian days, the sons of God did verily wed with our mothers, the irresistible daughters of Eve.  (Mardi)

in the allusion to Genesis 6:1-4, with special mention of the inherently irresistible charms of the fair sex.

From context (even the "trembling" Angels could not help but give in) it's clear that "resistless" in the 1852 text really means irresistible. 

Let's see, where else does Melville allude to Genesis 6:2? For a start, chapter 50 of Moby-Dick:

"... when though, according to Genesis, the angels indeed consorted with the daughters of men, the devils also, add the uncanonical Rabbins, indulged in mundane amours."

UPDATE: 
Another reference by Melville to Genesis 6:2-4, from early in Pierre:

Did not the angelical Lotharios come down to earth, that they might taste of mortal woman's Love and Beauty? even while her own silly brothers were pining after the self-same Paradise they left? Yes, those envying angels did come down; did emigrate; and who emigrates except to be better off? (Book II, iv)

Melville's Pierre was published at the end of July 1852; the excerpt from Scenes Beyond the Western Border is from the August 1852 installment.  And look here! the previous installment in July 1852 also recalled the descent of angels, down to earth, for Love's sake:

"... that electric chain of Love which binds humanity—and in the olden Time drew down angels!" (Scenes Beyond the Western Border, July 1852)