2 Corinthians

"for we walk by faith, not by sight," (2 Corinthians 5:7 NASB1995). 

Paul is telling us that rather than chasing things of this world, we should chase things we cannot see, an obvious allusion to God. The Pulpit Commentary says: "For we walk by faith (2 Corinthians 4:18; Hebrews 11:1; Romans 8:25). Not by sight; rather, not by appearance; not by anything actually seen. We do not yet see "face to face" (1 Corinthians 13:12), but are guided by things which "eye hath not seen".

"You are looking at things as they are outwardly. If anyone is confident in himself that he is Christ’s, let him consider this again within himself, that just as he is Christ’s, so also are we," (2 Corinthians 10:7 NASB1995).

Paul here is making an important point, tying in what was previously said in 2 Corinthians 10:1-2. People judged Paul for appearing weak, and Paul condemns this thought: "For they say, “His letters are weighty and strong, but his personal presence is unimpressive and his speech contemptible," (2 Corinthians 10:10 NASB1995).

Paul wants them to do self-reflection, the rest of the passage expands on this point. That you should only boast in the Lord (2 Corinthians 10:17), that is to say, we ought to give glory to God, as he acted through us: "We have therefore no reason to glory in ourselves, or in our own performances, but only to give thanks to God, who maketh use of us, poor earthly vessels, to carry about and distribute that heavenly treasure, by which he maketh souls rich in faith and good works: all that we do is only instrumentally," (Poole).