A man stuck in his own failure gets free the moment his attention goes to somebody else's hunger.
Shame runs a closed loop: attention turns inward, the inward look rehearses the failure, that rehearsal sets a state of unworthiness, and the state keeps a man away from the work he was built for. An assignment is what cuts it, because attention spent feeding someone else cannot at the same time audit his own worst night.
The Lord hands him responsibility rather than absolution, and that is the mercy, since a man forgiven and idle will put himself back on trial by morning. Anything that stops growing starts dying, and a person keeping his failure under review keeps it breathing. Refuse the work and the price is years of being sincerely sorry and useless, while the sheep go unfed.