Passage
In peace I will both lie down and sleep, For You alone, O Yahweh, make me to abide in safety.
In peace I will both lie down and sleep, For You alone, O Yahweh, make me to abide in safety.
Psalms 4:6 Many are saying, “Who will show us good?” Lift up the light of Your face upon us, O Yahweh!
Psalms 4:7 You have put gladness in my heart, More than when their grain and new wine abound.
Psalms 4:8 In peace I will both lie down and sleep, For You alone, O Yahweh, make me to abide in safety.
The verse centers on "peace", "both", "down", "sleep", "alone", "yahweh", "make", and "abide". It is saying that the verse draws attention to "peace" and "both", so its meaning should be read from those terms before moving to application.
The prior verse says "You have put gladness in my heart...", giving immediate footing for "peace" and "both". In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "peace" and "both" with trust shaped by these words, not by a vague optimism outside the passage.