Note 11 at 2 Cor. 11:6: Any inadequacy that Paul may have had in his speech (see note 16 at 2 Cor. 10:10, p. 1030) was more than compensated for by his knowledge. Paul's revelation knowledge (see note 1 at Lk. 2:26, p. 56; see notes 4-8 at 1 Cor. 2:9-13, p. 868-869) of God and His gospel was so powerful, it changed lives. Paul also used miraculous demonstrations of the Holy Spirit to persuade the people (see note 4 at 1 Cor. 2:4, p. 866) so that the Corinthians had gotten the full manifestation of what God had put in Paul. There are more ways to communicate the gospel than just in word only (see note 4 at Acts 4:30, p. 592).