Passage
And I shall be perfect with him: and shall keep myself from my iniquity.
And I shall be perfect with him: and shall keep myself from my iniquity.
2 Samuel 22:22 Because I have kept the ways of the Lord, and have not wickedly departed from my God.
2 Samuel 22:23 For all his judgments are in my sight: and his precepts I have not removed from me.
2 Samuel 22:24 And I shall be perfect with him: and shall keep myself from my iniquity.
2 Samuel 22:25 And the Lord will recompense me according to my justice: and according to the cleanness of my hands in the sight of his eyes.
2 Samuel 22:26 With the holy one thou wilt be holy: and with the valiant perfect.
The verse centers on "shall", "perfect", "keep", "myself", and "iniquity". It is saying that the verse draws attention to "shall" and "perfect", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 23's "For all his judgments are in my..." into verse 25's "And the Lord will recompense me according...", so "shall" and "perfect" 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 "shall" and "perfect" with trust shaped by these words, not by a vague optimism outside the passage.