Passage
For Thou <FI>art<Fi> my lamp, O Jehovah, And Jehovah doth lighten my darkness.
For Thou <FI>art<Fi> my lamp, O Jehovah, And Jehovah doth lighten my darkness.
2 Samuel 22:27 With the pure Thou shewest Thyself pure, And with the perverse Thou shewest Thyself a wrestler.
2 Samuel 22:28 And the poor people Thou dost save, And Thine eyes on the high causest to fall.
2 Samuel 22:29 For Thou <FI>art<Fi> my lamp, O Jehovah, And Jehovah doth lighten my darkness.
2 Samuel 22:30 For by Thee I run--a troop, By my God I leap a wall.
2 Samuel 22:31 God! Perfect <FI>is<Fi> His way, The saying of Jehovah is tried, A shield He <FI>is<Fi> to all those trusting in Him.
The verse centers on "light", "darkness", "thou", "lamp", "jehovah", "doth", and "lighten". 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 28's "And the poor people Thou dost save..." into verse 30's "For by Thee I run--a troop By...", so "light" and "darkness" belong inside that flow. In 2 Samuel 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.