2 Corinthians 10

Two key verses in this chapter are life-changing:

• 2 Cor. 10:4-5 -- We don't do battle according to the flesh. We fight spiritual battles with spiritual weapons. A spiritual stronghold is a way of thinking that exalts itself against the knowledge of God. It is an 'idea' or 'imagination' depending on your translation. It is not something that is distant and frightening. It is close and invisible, a way of thinking about life that is against God's will.
• 2 Cor. 10:12 -- Those who measure themselves by themselves lack understanding and wisdom. How much more clearly can it be said that it is not about me?! How someone goes about deriving their identity says a lot about how they understand the gospel.
  

Paul does spend a lot of time defending himself and his ministry. How do you know when to do that and when to be content to be wronged? I'm not sure.