What did Jesus quote Psalm 22: "My God, My God, why have you forsaken me?" What is the correlation between these two scripture?
Why Jesus felt forsaken if he knew what was going on?
Why was it mentioned in Old Testament as well as New Testament(in two places)?


My God, My God, why have You forsaken Me? Why are You
so far from helping Me, And from the words of My groaning? (Psalm 22:1, NKJV)
And about the ninth hour Jesus cried out with a
loud voice, saying, “Eli, Eli, lama sabachthani?” that is, “My God,
My God, why have You forsaken Me?” (Matthew 27:46, NKJV)
He was quoting David in Psalm 22.  But nevertheless, Jesus must have felt these words Himself. What it was like for the Son of God to experience "Hell", or separation from God, we can not begin to imagine.

We can only speculate that Jesus, when He uttered those words, felt God had abandoned Him in a real way, not a symbolic way. Jesus truly felt separated from God, and that was far worse than even the pain and suffering on the Cross.