John Chrysostom
Together with praises and thanksgivings, he strongly reproves them. You were taught the dogmas of truth, he says, not by outward philosophy and not by outward instruction, but by the grace of God. This was according to the riches of understanding and word granted by Him, and you were confirmed in the Lord’s testimony, that is, in the preaching. You were counted worthy of many signs, many miracles, and ineffable grace when you received the preaching. Therefore, if you were confirmed by signs and grace, why are you wavering? While rebuking them, he also disposes them favorably toward himself by what he has said.