1 FINALLY, my brethren, rejoice in the Lord. To write the same things to you, to me indeed is not grievous, but for you it is safe.
2 Beware of dogs, beware of evil workers, beware of the concision.
3 For we are the circumcision, which worship God in the spirit, and rejoice in Christ Jesus, and have no confidence in the flesh.
4 Though I might also have confidence in the flesh. If any other man thinketh that he hath whereof he might trust in the flesh, I more:
5 Circumcised the eighth day, of the stock of Israel, of the tribe of Benjamin, an Hebrew of the Hebrews; as touching the law, a Pharisee;
6 Concerning zeal, persecuting the church; touching the righteousness which is in the law, blameless.
7 But what things were gain to me, those I counted loss for Christ.
8 Yea doubtless, and I count all things but loss for the excellency of the knowledge of Christ Jesus my Lord: for whom I have suffered the loss of all things, and do count them but dung, that I may win Christ,
9 And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith:
10 That I may know him, and the power of his resurrection, and the fellowship of his sufferings, being made conformable unto his death;
11 If by any means I might attain unto the resurrection of the dead.
12 Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus.
13 Brethren, I count not myself to have apprehended: but this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before,
14 I press toward the mark for the prize of the high calling of God in Christ Jesus.
15 Let us therefore, as many as be perfect, be thus minded: and if in any thing ye be otherwise minded, God shall reveal even this unto you.
16 Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing.
17 Brethren, be followers together of me, and mark them which walk so as ye have us for an ensample.
18 (For many walk, of whom I have told you often, and now tell you even weeping, that they are the enemies of the cross of Christ:
19 Whose end is destruction, whose God is their belly, and whose glory is in their shame, who mind earthly things.)
20 For our conversation is in heaven; from whence also we look for the Saviour, the Lord Jesus Christ:
21 Who shall change our vile body, that it may be fashioned like unto his glorious body, according to the working whereby he is able even to subdue all things unto himself.

1Finally, my brethren, reioyce in the Lorde. To write the same things to you, to me indeed is not grieuous: but for you it is safe.
2Beware of dogs, beware of euill workers: beware of the concision.
3For we are the circumcision, which worship God in the spirit, and reioyce in Christ Iesus, and haue no confidence in the flesh.
4Though I might also haue confidence in the flesh. If any other man thinketh that hee hath whereof hee might trust in the flesh, I more:
5Circumcised the eight day, of the stocke of Israel, of the tribe of Beniamin, an Hebrew of the Hebrewes, as touching the Law, a Pharise:
6Concerning zeale, persecuting the Church: touching the righteousnesse which is in the Law, blamelesse.
7But what things were gaine to me, those I counted losse for Christ.
8Yea doubtlesse, and I count all things but losse, for the excellencie of the knowledge of Christ Iesus my Lord: for whom I haue suffered the losse of all things, and doe count them but doung, that I may win Christ,
9And be found in him, not hauing mine owne righteousnesse, which is of the Law, but that which is through the faith of Christ, the righteousnesse which is of God by faith:
10That I may know him, and the power of his resurrection, and the fellowship of his sufferings, being made conformable vnto his death,
11If by any meanes I might attaine vnto the resurrection of the dead.
12Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Iesus.
13Brethren, I count not my selfe to haue apprehended: but this one thing I doe, forgetting those things which are behinde, and reaching forth vnto those things which are before,
14I presse toward the marke, for the price of the high calling of God in Christ Iesus.
15Let vs therefore, as many as bee perfect, bee thus minded: and if in any thing ye be otherwise minded, God shal reueale euen this vnto you.
16Neuerthelesse, whereto wee haue alreadie attained, let vs walke by the same rule, let vs minde the same thing.
17Brethren, be followers together of me, and marke them which walke so, as ye haue vs for an ensample.
18(For many walke, of whome I haue told you often, and now tell you euen weeping, that they are the enemies of the crosse of Christ:
19Whose end is destruction, whose God is their belly, and whose glorie is in their shame, who minde earthly things.)
20For our conuersation is in heauen, from whence also we looke for the Sauiour, the Lord Iesus Christ:
21Who shall change our vile bodie, that it may bee fashioned like vnto his glorious body, according to the working whereby he is able euen to subdue all things vnto himselfe.

1 Finally, my brothers, rejoice in the Lord. Writing the same things to you is no burden for me but is a safeguard for you. 2 Beware of the dogs! Beware of the evil workers! Beware of the mutilation! 3 For we are the circumcision, we who worship through the Spirit of God, who boast in Christ Jesus and do not put our confidence in flesh, 4 although I myself have grounds for confidence even in the flesh.If anyone else thinks he can be confident in flesh, all the more can I. 5 Circumcised on the eighth day, of the race of Israel, of the tribe of Benjamin, a Hebrew of Hebrew parentage, in observance of the law a Pharisee, 6 in zeal I persecuted the church, in righteousness based on the law I was blameless. 7 (But) whatever gains I had, these I have come to consider a loss because of Christ. 8 More than that, I even consider everything as a loss because of the supreme good of knowing Christ Jesus my Lord. For his sake I have accepted the loss of all things and I consider them so much rubbish, that I may gain Christ 9 and be found in him, not having any righteousness of my own based on the law but that which comes through faith in Christ, the righteousness from God, depending on faith 10 to know him and the power of his resurrection and (the) sharing of his sufferings by being conformed to his death, 11 if somehow I may attain the resurrection from the dead. 12 It is not that I have already taken hold of it or have already attained perfect maturity, but I continue my pursuit in hope that I may possess it, since I have indeed been taken possession of by Christ (Jesus). 13 Brothers, I for my part do not consider myself to have taken possession. Just one thing: forgetting what lies behind but straining forward to what lies ahead, 14 I continue my pursuit toward the goal, the prize of God's upward calling, in Christ Jesus. 15 Let us, then, who are "perfectly mature" adopt this attitude. And if you have a different attitude, this too God will reveal to you. 16 Only, with regard to what we have attained, continue on the same course. 17 Join with others in being imitators of me, brothers, and observe those who thus conduct themselves according to the model you have in us. 18 For many, as I have often told you and now tell you even in tears, conduct themselves as enemies of the cross of Christ. 19 Their end is destruction. Their God is their stomach; their glory is in their "shame." Their minds are occupied with earthly things. 20 But our citizenship is in heaven, and from it we also await a savior, the Lord Jesus Christ. 21 He will change our lowly body to conform with his glorified body by the power that enables him also to bring all things into subjection to himself.

v 1. When Paul says “finally”, it is like a preacher putting his watch on the pulpit, it doesn’t mean a thing! Seriously, he is introducing a new subject, dangers from outside  the church, and gladly reviewing what he had told them on previous occasions.
v 2. Jewish unbelievers had become dogs like the Gentile unbelievers and were merely mutilating their flesh rather than having true circumcision of the heart. They were dogs in character, evil workers in conduct, and concision (mutilation) in creed.
v 3. Believers were the true circumcision of the heart and could worship by the Spirit of God with no regard for outward appearance or human accomplishment.
v 4-6. While Paul did not boast in any human worth, he points out seven reasons why he could be superior in comparison to his critics, but which he counted loss for Christ, v 7. The first four are advantages from birth, the last three he chose.
a. Circumcised the eighth day. Not later as a proselyte but as a full blooded Jew. Mentioned first because it was such a big issue with the Judaizers.
b. Stock of Israel. Both parents true Jews tracing back to Abraham.
c. Tribe of Benjamin. The one tribe, besides Judah, that remained loyal to David.
d.Hebrew of Hebrews. Understood and practiced their language and customs.
e. A Pharisee. Strictest sect, adhering to laws of Moses and their added laws.
f. Zeal. No one could match the zeal with which he persecuted the Church.
g. Blameless. Had considered himself perfect in legalistic righteousness.
v 7-9. After Paul’s conversion he considered those advantages and found them totally worthless compared to a personal relationship with Christ. Rather than self righteousness, he now, by the Spirit, was clothed in the righteousness of Christ.
v 10. Instead of the seven advantages, Paul preferred to know by experience a more intimate relationship with Christ; to experience the power the resurrected Christ exerts upon believers. Not sharing Christ’s sufferings on the cross, but the sufferings for the sake of righteousness, so as Christ suffered for sins, Paul died to sin, Col. 3:3.
v 11. Paul looked for the Rapture in his lifetime or resurrection of righteous dead.
v 12-14. Paul had not achieved the goals of verse 10 and had not reached a stage of completeness, but saw the need to continue to grow in the Lord. He would not rest on past achievements or heritage, but athletically speaking, would strive for the prize of glorification and rewards in heaven. It is the rest of the race that counts.
v 15,16. Mature believers should seek for deeper understanding of God, but meanwhile live according to the knowledge they have.
v 17. Follow other believers as they follow the Lord, 1 Cor. 11:1; 1 Thess. 1:6. 
v 18,19. Paul had a deep concern that they not follow doomed false teachers who a. were engrossed in physical desire; b. Took pride in what they should be ashamed, c. were obsessed with earthly affairs.
v 20,21. They were Philippian colonists, but citizens of Rome. I was a transient soldier in Japan, but a citizen of the US, no matter how far away it seemed at times. We are pilgrims here, but our citizenship is  in heaven. We look for the Rapture when Christ will return and by His power, change our vile bodies and fashion them like His glorious body. This will prepare us for the glorious presence of God.