|Wow. Beautiful. Thank you.
I have a few suggestions if you want to tighten up your meter. I will use line numbers for brevity.
2) great. If you wanted to lengthen your phrases you could say "WHO paid..."
3) "to (or for) you, my God, I would refuse no thing" or " give everything"
4) horribly doesn't scan.... Try some other things "who died upon the cross" would fit but is too obvious. "You died a dreadful (or shameful) death..." " your broken heart and body make me whole"... You let them ( or us) break your life to make me ( or us) whole. " I don't know. But see if you can make this truthmore vivid and new.
5) "..the heav'ns..." Or the skies or your home if you want to keep the rhythm exact, but as you said, the Bard didn't always, either. (Iambic is "da-DUM" "the South," not "southern", BTW.)
6) you could say "And did not" if you wanted to extend the sentence.
8) good, or "But came..." See 6.
9) 10 syllables, okay. If you wanted to be fussy about the stresses, you could say "you lived here as a carpenter's dear son" or "You lived for thirty years a workman's son"
11)"And from the cross you did not..."
12) "Both hands and feet by cruel nails have been scarred." Or something. You have an extra syllable.
13)Take out the second "my" or else "my Lord, my God" to get 10 syllables
14) is this really the line you want? It sounds a little rhyme-forced to me, even though I have a sonnet that ends with the same last rhymes:
"Yet here it is we see our Lord and God.
"How wonderful Your ways. How strange. How odd."
But that's the magi thinking how weird it was to find him in the stable and not the palace.
If you like it, just switch to "I never will begin..."
If you aren't quite satisfied, try the word "awed" for your last rhyme, or switch "God" and "Lord" around in 13 and work with a different set of rhymes: word, adored, soared, sword, etc. Or you could go back to King, but that would give you ABAB CDCD AA which you may not want.
Anyway, those are just nit picks that you may want to mess with or may not. But thank you for the beautiful theme and may you continue to praise God with your life and words.