Why did Jesus cry "My God, My God, why have You forsaken Me?" from the cross?

This is a wisdom psalm, a calm and collected meditation on the nature of true wealth and security. It is not a cry of joy or a wail of despair; it is a steady, measured reflection, the voice of an elder who has seen the rise and fall of the wicked and the quiet endurance of the righteous. Verse 16 delivers the core teaching: