1 Corinthians 2:4 - Wesley's Explanatory Notes

And my speech in private, as well as my public preaching, was not with the persuasive words of human wisdom, such as the wise men of the world use; but with the demonstration of the Spirit and of power — With that powerful kind of demonstration, which flows from the Holy Spirit; which works on the conscience with the most convincing light, and the most persuasive evidence.