Paul was really despised and disparaged in Corinth and had to defend his ministry and authenticity as an apostle. He reminded them of the signs of an apostle: signs, miracles, wonders! He even entreated them to accept his authority, even begging for their ears and was frank even blunt. But this seemed to fall on deaf ears and they were spiritually hard of hearing! This was done by literary techniques of restatement and repetition of his points to drive them home and strike a chord to resonate with them on their "home page" and get on the same page finding common ground and commonality, not points of disagreement, especially of opinions. It was obvious to the Corinthians that Paul could be quite articulate and authoritarian in letters but not in person. This did not qualify him as timid or as a gifted speaker, and this in no way reflected on his knowledge, expertise, or experience, and especially his authority as the appointed apostle of Jesus.
He used this as an excuse to teach and instruct them and he did not rely on a human playbook or means but used "divine power" to demolish the strongholds of Satan and the world. Not to rely on human authority but depending on the power of the Spirit so that their faith does not rest in the power or authority of men but in God alone! The divine weapon of choice was the Word of God and not opinion, oratory skill, education, or biblical or world savvy. But Paul knew how to get their attention! This is encouraging to us who are unlearned and have handicaps to overcome.
Paul wasn't one to lord it over them either but shared the ministry of the Spirit that we all take part in the work of God according to the gifts of the same Spirit. Paul knew that you could not argue someone into the kingdom or win one over by the art of persuasion techniques alone. He didn't try to rationalize nor appeal to logic alone. Our faith must be in the power of God in the gospel ("for it is the power of God unto salvation..."). Paul believed in living the gospel message out and his life showed more suffering for Christ than anyone who ever lived. But in all this Paul never had a martyr's complex thinking the more you suffer the better Christian.
He was humble and thought of himself as the chief of sinners. He said that this is a way of becoming all things to all people and reaching out to the lost and those unreachable by other means such as the church. This is to say that if we are not hypocrites and practice our faith and prove our faith by good works and fruit, then people will be drawn to Christ God fills the vacuum in the soul and draws people to Christ. In sum, to be obedient to the heavenly vision, we must see the light and depend upon God's armor and power of the Spirit not ourselves. Soli Deo Gloria!