Passage
Me hath he led, and brought into darkness, and not into light.
Me hath he led, and brought into darkness, and not into light.
Lamentations 3:1 I am the man that hath seen affliction by the rod of his wrath.
Lamentations 3:2 Me hath he led, and brought into darkness, and not into light.
Lamentations 3:3 Surely against me hath he turned again and again his hand all the day.
Lamentations 3:4 My flesh and my skin hath he wasted away, he hath broken my bones.
The verse centers on "light", "darkness", "hath", and "brought". 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 1's "I am the man that hath seen..." into verse 3's "Surely against me hath he turned again...", so "light" and "darkness" belong inside that flow. In Lamentations context, the local focus is covenant, worship, and faithfulness.
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.