Paul again invites the Philippians to rejoice in the Lord and warns them against those who impose circumcision. He says the true circumcision are those who serve God by the Spirit, glory in Christ Jesus and put no confidence in the flesh.
Paul could have more reason than anyone to trust the flesh: circumcised on the eighth day, of the people of Israel, of the tribe of Benjamin, a Hebrew of Hebrews, a Pharisee as to the law, a persecutor of the church in zeal, and blameless as to righteousness under the law. But whatever gain he had, he counted as loss for the sake of Christ; more than that, he counts everything as loss and rubbish because of the surpassing worth of knowing Christ Jesus, that he may gain Christ and be found in him, not having a righteousness of his own that comes from the law, but that which comes through faith in Christ, the righteousness from God that depends on faith. He wants to know him, the power of his resurrection and the fellowship of his sufferings, that he may attain the resurrection from the dead.
He does not say he has already obtained it or is perfect, but he presses on to make his own that for which Christ Jesus made him his own. Forgetting what lies behind and straining forward to what lies ahead, he presses on toward the goal for the prize of the upward call of God in Christ Jesus. He asks the mature to think this way. He urges them to imitate him and to watch those who walk according to the pattern they have, for many walk as enemies of the cross of Christ, whose end is destruction, whose god is their belly and whose glory is in their shame.
Their citizenship, by contrast, is in heaven, from which they await a Savior, the Lord Jesus Christ, who will transform their lowly body to be like his glorious body, by the power that enables him to subject all things to himself.