Passage
If I say, “Surely the darkness will overwhelm me; the light around me will be night”;
If I say, “Surely the darkness will overwhelm me; the light around me will be night”;
Psalms 139:9 If I take the wings of the dawn, and settle in the uttermost parts of the sea;
Psalms 139:10 Even there your hand will lead me, and your right hand will hold me.
Psalms 139:11 If I say, “Surely the darkness will overwhelm me; the light around me will be night”;
Psalms 139:12 even the darkness doesn’t hide from you, but the night shines as the day. The darkness is like light to you.
Psalms 139:13 For you formed my inmost being. You knit me together in my mother’s womb.
The verse centers on "light", "darkness", "surely", "overwhelm", "around", and "night". It is saying that the contrast between light and darkness marks a real divide in how people respond to God's work.
The nearby context moves from verse 10's "Even there your hand will lead me..." into verse 12's "even the darkness doesn t hide from...", so "light" and "darkness" belong inside that flow. 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 "light" and "darkness" with trust shaped by these words, not by a vague optimism outside the passage.