Psalms 22:2-3

Psalms 22:2-3. O my God, I cry in the daytime, but thou hearest not; and in the night season, and am not silent. But thou art holy, O thou that inhabitest the praises of Israel.

Notice that the Lord Jesus, in his greatest agony, does not impugn the justice of his Father’s treatment, in his bitterest sufferings he still adores the holiness of God: "Thou art holy." It was because God was holy that therefore his Son must suffer so, in order to save the unholy.