This chorus is a chorus of lies. The psalmist rejects these lies. And we need to begin to reject these lies as well. A shield protects. It comes between the blows of an enemy and a person's vulnerable places.
Most shields are small and can only protect a limited area from attack.
But the shield which the Lord provides completely surrounds us. We can let this shield protect us from these attacking messages. Heavy burdens of shame, neglect and abuse have bowed our heads. The Lord listens, pays attention and cares about us. His love counters the voices of our internal shame-chorus so that we can lift our heads.