An early review of the long title poem says that it has no memorable lines. This is half true: the memorable lines are the ones that come straight out of the Bible and thus kind of shock you to find them in unfriendly surroundings.
CS Lewis famously said that Jesus is either a Liar, a Lunatic, or the Lord. This poem is a fascinating attempt at reading Jesus, as he is seen in the Gospels, as a Lunatic. Jeffers's Jesus, at least in this poem, is a psychologial genius with at least a little bit of a gift for miracle: he's also completely insane from the lying claims of his mother that he is God's son and not a bastard. (Lewis also argued that if any miracles are possible the divine birth is certainly possible, but a poet can pick and choose his materials, fine.) It's worth a read, at least for the theological shock value of seeing a very smart guy deal with the same stories everyone else has to work with and coming up with a wildly different answer.
The other poems aren't so great. "The Happy Shepherdess" is another look at Jesus as a Lunatic: this time it's a pregnant Californian woman who gets to play the Jesus-role, but she takes the wholly-benevolant side of his character. She dies unable to protect her sheep, pointlessly, without issue.
Well, we don't read Jeffers for his chirpy good humor.