For we cannot do anything against the truth, but only for the truth.

 2 Corinthians 13:1-14

On my return I will not spare those who sinned earlier or any of the others, since you are demanding proof that Christ is speaking through me. He is not weak in dealing with you, but is powerful among you. For to be sure, he was crucified in weakness, yet he lives by God’s power. Likewise, we are weak in him, yet by God’s power we will live with him in our dealings with you.

Examine yourselves to see whether you are in the faith; test yourselves. Do you not realize that Christ Jesus is in you—unless, of course, you fail the test? And I trust that you will discover that we have not failed the test. Now we pray to God that you will not do anything wrong—not so that people will see that we have stood the test but so that you will do what is right even though we may seem to have failed. For we cannot do anything against the truth, but only for the truth. We are glad whenever we are weak but you are strong; and our prayer is that you may be fully restored. This is why I write these things when I am absent, that when I come I may not have to be harsh in my use of authority—the authority the Lord gave me for building you up, not for tearing you down.

Why?

Even Paul mentioned some words to remind the brothers in Corinth, but Paul still had faith that he was an example to live for the Lord, and that they might build their lives in Christ.

Paul reminds us we cannot do anything against the truth, but only for the truth.

We should like Paul's work for building brothers up, not for tearing them down.