How ruthless are the gentle — Sabachthani

"God broke his contract" hints at the answer, about sabachthani. Dickinson commented the Crucifixion and sabachthani. "To qualify the Wind" shows her doubt.

How ruthless are the gentle-
How cruel are the kind-
God broke his contract to his Lamb
To qualify the Wind-
(F.1465/J.1439)
[1, 2] ruthless, cruel:: the Crucifixion of Jesus Christ.
[1, 2] gentle, kind:: the love of God.
[3] broke his contract:: God has forsaken Jesus, "my God, why hast thou forsaken me?" (Mark 15:34)
[3] his Lamb:: Lamb of God, Jesus Christ. "The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world." (John 1:29)
[4] Wind:: speech, talk (OED 11b). qualify:: Jesus must die first to qualify the saying "the Son of man be risen again from the dead."

And at the ninth hour Jesus cried with a loud voice, saying, Eloi, Eloi, lama sabachthani? which is, being interpreted, My God, my God, why hast thou forsaken me? (Mark 15:34)