Analysis of The Unpardonable Sin

I do not cry, beloved, neither curse.
 Silence and strength, these two at least are good.
 He gave me sun and start and aught He could,
But not a woman's love; for that is hers.

He sealed her heart from sage and questioner --
 Yea, with seven seals, as he has sealed the grave.
 And if she give it to a drunken slave,
The Day of Judgment shall not challenge her.

Only this much: if one, deserving well,
 Touching your thin young hands and making suit,
 Feel not himself a crawling thing, a brute,
Buried and bricked in a forgotten hell;

Prophet and poet be he over sod,
 Prince among angels in the highest place,
 God help me, I will smite him on the face,
Before the glory of the face of God.