2 Corinthians 1:24 affirms Paul's authority is for building up, not lording over — directly echoing the purpose stated in 2 Cor 10:8.

2 Corinthians 13:3 speaks of Christ speaking powerfully in Paul — revealing the source of the authority he boasts in 2 Cor 10:8.

In 2 Corinthians 13:10, Paul repeats the identical phrase about authority given for building up, not tearing down, reinforcing his apostolic purpose.

In 12:19, Paul explicitly says everything is for your upbuilding—directly echoing the same purpose of his authority in this verse.

In 12:20, Paul fears finding quarreling and jealousy—the opposite of the building up he aims for here. Clear contrast.

In Philemon 1:8, Paul confidently commands what is proper—directly reflecting the same apostolic authority he mentions here.

In 1 Corinthians 4:21, Paul asks whether to come with discipline or love — reflecting the same authority he uses for building up, not tearing down.

In Galatians 1:1, Paul asserts his apostleship comes from God, not men — grounding the divine source of the authority he claims in 10:8.