For he that wrought effectually in Peter ... - Or by the means or agency of Peter. The argument here is, that the same effects had been produced under the ministry of Paul among the Gentiles which had been under the preaching of Peter among the Jews. It is inferred, therefore, that God had called both to the apostolic office; see this argument illustrated in the notes at Acts 11:17.
The same was mighty in me ... - In enabling me to work miracles, and in the success which attended the ministry.