2 Corinthians 13:3-5

3I will give you all the proof you want that Christ speaks through me. Christ is not weak when he deals with you; he is powerful among you.

4Although he was crucified in weakness, he now lives by the power of God. We, too, are weak, just as Christ was, but when we deal with you we will be alive with him and will have God’s power.

5Examine yourselves to see if your faith is genuine. Test yourselves. Surely you know that Jesus Christ is among you; if not, you have failed the test of genuine faith.