First, the Holy Spirit did not leave Jesus. Only Jesus’s “spirit” left him, that is, that which animated his body - his soul, if you will. “Spirit”, “soul”, and “ghost”, have been used interchangeably for centuries.
Second, how can Jesus question “God’s will” when Jesus is part of the triune Godhead? Remember basic catechism: three persons in one God - the Father, the Son, and the Holy Spirit. Jesus could no more “separate” himself from God than could the other two persons forming the triune Godhead.
Third, Johnbres, you said:
*Why is the clearest interpretation of Jesus’ words on the cross never mentioned? That is, that He was a human being in agony, and felt abandoned by God. He wasn’t just pretending to feel this way, and groaning out the words of the Psalm as some sort of nod-and-wink to the Jews, like, “hey, this is where I am suffering like the righteous man who triumphs.” Rather, he was identifying with human suffering by actually experiencing it in the most extreme manner. He felt abandoned, but was still crying out to God, because he understood that God was still there, but it didn’t feel like it right then.
We should not be afraid of the fact that Jesus was a human being in addition to being God. Too many Catholics don’t go there for a minute because they are worried that Jesus cannot be God if He was too human. You have to accept Jesus’ humanity as well as his divinity. He suffered… *
The answer (in my humble opinion) is that this is not Occam’s Razor example (that is, where we should tend towards simpler theories until we can trade simplicity for increased explanatory power).
You are entirely correct that Christ suffered in every way that a human being would suffer, both physically and mentally.
But - and this is the key - the hypostatic union precludes separating Christ’s nature from his divine nature. Although he was fully human, he was part of the triune Godhead who took human form to serve a purpose. To even suggest that Christ felt abandoned by God would presuppose that Christ was not prepared for the suffering he was about to undergo and that he fell into a weak state.
One thing that is very easy for us to forget is that Christ knew from the beginning of time that he would have to undergo what he did. If we accept (as you suggest) that Christ “lost it” for a moment, then you are implicitly stating that Christ also LOST his divinity for a moment . . . and that was something that could not happen.
Your explanation is definitely an “easy” one to explain what Christ said. That is, until one reads the entire Psalm he was quoting and realizing that he did so for a twofold purpose:
(1) to quicken the minds of the Sanhedrin so that they paused to contemplate and ask themselves, “what did we do in seeking this man’s death?”, and
(2) expressing himself as having unwaivering confidence in God, which is what the entire Psalm is about.
As I mentioned in another thread, “My God, my God, why have you forsaken me?” should have been translated from the Hebrew/Aramaic as: “My God, my God, why have you left me to the fury of my enemies?”
Well, we know why - to redeem mankind. Surely, Christ did not forget that . . .