All things bear record · 2 Corinthians
4 witnesses of Christ here, and 2 further echoes from the reading.
Christ — the Anointed One
Now I Paul myself beseech you by the meekness and gentleness of Christ, who in presence am base among you, but being absent am bold toward you: 2 Corinthians 10:1
Paul pleads with the Saints by appealing to Christ's own meekness and gentleness. The Savior's character is the model for how Paul wants to lead them.
How we know: the verse itself names Him
Christ — the Anointed One
Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ; 2 Corinthians 10:5
True discipleship brings even our thoughts under obedience to Christ. Paul's spiritual warfare is fought by making every idea answer to Him.
How we know: the verse itself names Him
Do ye look on things after the outward appearance? If any man trust to himself that he is Christ’s, let him of himself think this again, that, as he is Christ’s, even so are we Christ’s. 2 Corinthians 10:7
To be "Christ's" is to belong to Him. Paul reminds the Saints that he and his companions belong to the Savior just as surely as anyone who boasts of it.
How we know: the verse itself names Him
For though I should boast somewhat more of our authority, which the Lord hath given us for edification, and not for your destruction, I should not be ashamed: 2 Corinthians 10:8
Paul's apostolic authority was given by the Lord, whom Paul elsewhere calls the one who called him (Galatians 1:1). Priesthood authority is meant to build people up, not tear them down.
Christ — the Anointed One
For we stretch not ourselves beyond our measure, as though we reached not unto you: for we are come as far as to you also in preaching the gospel of Christ: 2 Corinthians 10:14
Paul's mission to Corinth was to preach the gospel of Christ. The good news is His good news.
How we know: the verse itself names Him
LORD — the covenant name of God, Jehovah
But he that glorieth, let him glory in the Lord. 2 Corinthians 10:17–18
Paul quotes Jeremiah, where "the LORD" is Jehovah, and applies it to the Lord his readers know, Jesus Christ. Latter-day Saints recognize Jehovah as the premortal Christ, so the glory belongs to Him and only His approval matters.