O Lord, don’t rebuke me in your anger
    or discipline me in your rage!
² Your arrows have struck deep,
    and your blows are crushing me.
³ Because of your anger, my whole body is sick;
    my health is broken because of my sins.
⁴ My guilt overwhelms me—
    it is a burden too heavy to bear.
⁵ My wounds fester and stink
    because of my foolish sins.
⁶ I am bent over and racked with pain.
    All day long I walk around filled with grief.
⁷ A raging fever burns within me,
    and my health is broken.
⁸ I am exhausted and completely crushed.
    My groans come from an anguished heart. Psalm 38:1-8

Why do you think God was so harsh with the writer of the Psalm?