What does Psalm 37:37 mean?
The expression "to mark," as used here, means "to take note of, or to pay special attention to." David's instruction is for the reader or hearer to look at the example of those who are "blameless" and "upright.""Blameless" does not mean sinlessly perfect. No person, other than Jesus, has ever been or ever will be perfect (Hebrews 4:15). Jesus never thought a sinful thought, nor did He commit a sinful act. But every other human being has sinned and falls short of God's glory (Romans 3:23). Rather, to be blameless means to be "above reproach." Paul told Timothy that a church leader "must be blameless" (1 Timothy 3:2 KJV). If only perfectly sinless men were qualified to be overseers, no church would have an overseer.
In a similar way, those who are upright can be contrasted with those who are crooked (Proverbs 17:20). As do other general statements in Psalms and Proverbs, this verse notes that the morally upright person is more likely to see a peaceful future (Proverbs 9:10–11). The word "future" may imply that his descendants, too, will enjoy peace.
Christians enjoy peace with God (Romans 5:1), and by committing their concerns to God in prayer they can also enjoy the peace of God in their hearts and minds (Philippians 4:7).