Then said Jesus unto them, When ye have lifted up the Son of man, then shall ye know that I am he, and that I do nothing of myself; but as my Father hath taught me, I speak these things. John 8:28
The readers of Psalm 22 may have decided David was COMPLAINING when he cried "Eloi - Eloi, lama sabachthani" (My God, my God, Why have you forsaken me?), and when Jesus reiterated that from the cross, in Mk15:34, it seemed to many that he was puzzled at this turn of events. Or was he just referring to that 22nd Psalm as a way of confirming that prophecy?
22:16 For dogs have compassed me: the assembly of the wicked have inclosed me: they pierced my hands and my feet.
22:18 They part my garments among them, and cast lots upon my vesture.
22:31 They shall come, and shall declare his righteousness unto a people that shall be born, that he hath done this.
Like those who know the music or poetry from the first line, Jesus was referring to that psalm as a way of telling them who he was! Those who believed in Him would know for sure! He was QUOTING SCRIPTURE! And isn't that appropriate for the 22nd spoke?
Dux allows: "It is the glory of God to conceal a thing: but the honour of kings is to search out the matter". Pr25:2