How can we move from the anxious tossing on a bed, to a place of peace? from
when you are on your beds, search your hearts and be silent. (Psalm 4:4)
In peace I will lie down and sleep, for you alone, Lord, make me dwell in safety. (Psalm 4:8)
David seems to find his way through sacrifice –
Offer the sacrifices of the righteous and trust in the Lord (Psalm 4:5)
This is not, ‘Give up something to manipulate God into what we want’, but the sacrifice of that which is so important it drives to anxiety. Anxiety is an early warning system showing us our inappropriate affections. In sacrificing our demands we come to a place of peace.
When I give up my demands I entrust myself to God and His love, knowing that the Lord is both good and sovereign. This surrender of what I am convinced will be good is faith indeed. When I exercise such faith, my heart shifts from a desire for personal prosperity to a desire for God Himself. We cannot purse both at the same time.
Many, Lord, are asking, ‘Who will bring us prosperity?’ Let the light of your face shine on us. Psalm 4:6
In letting go, David has gained the greater perspective, that the Lord himself is our reward. Everything else is a trinket compared to the Lord who is our true treasure. In knowing that He is safe with God, he can lie down at peace in safety.
A more detailed study on Psalm 4 is found in BibleBase2ADaringFaith