In verses 4-8, Paul lists how he qualifies for being considered a righteous Jew. In every way, Paul was an exemplary Jew. But he contrasts this with the greatness of knowing Jesus. (See: [[rc://en/tw/dict/bible/kt/righteous]])
We know very little about what people will be like in heaven. Paul teaches here that Christians will have some kind of glorious body and will be free from sin. (See: [[rc://en/tw/dict/bible/kt/heaven]] and [[rc://en/tw/dict/bible/kt/sin]])
Paul uses an extended illustration to describe the Christian life. The goal of the Christian life is attempting to grow to be like Christ until a person dies. We can never achieve this goal perfectly, but we must strive for it.