Philippians 3:2

Textus Receptus:
βλεπετε τους κυνας βλεπετε τους κακους εργατας βλεπετε την κατατομην

King James:
Beware of dogs, beware of evil workers, beware of the concision.

Comments:
beware...beware...beware: Although Christians are to live beyond fear (1 John 4:18) they are not to be imprudent. This balance makes it clear that Jesus' command to the seventy in Matthew 10:16 (to be "wise as serpents, but harmless as doves") also applies to contemporary believers.

dogs...evil workers...concision: Paul is referring to the same people three different ways, with a slightly different emphasis each time. That they are dogs warns believers that they are unclean and outsiders (non-believers). John uses the word this way in Revelation 22:15; Jesus in Matthew 7:6. That they are evil workers points to the injurious nature of their activity. It is not just rational or the best doctrine to avoid their heresies, but actually important for the welfare of the Philippians. Matthew 21:41 uses the word for "evil" to modify destruction. Paul makes a change with the word concision. It is singular, pointing to the dogs and evil workers as a single group. Although heretics may not agree with each other, they are united by the fact that they stand against and threaten the word and work of God.

Expanded Paraphrase:
Be aware of and look out for those unclean, attacking dogs. Be aware of and look out for those whose work results in your own destruction. Be aware of and look out for those who in all their different ways cut brutally through the truth (ignoring and destroying it), rather than cleanly around it.

Philippians 3:1

Textus Receptus:
το λοιπον αδελφοι μου χαιρετε εν κυριω τα αυτα γραφειν υμιν εμοι μεν ουκ οκνηρον υμιν δε ασφαλες

King James:
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.

Comments:
Finally...rejoice: As chapter 4:4 will establish in its context, this rejoicing is fundamental to Paul's point because of its source and stability, not just its emotional manifestation.

the same things...not grievous: Paul focuses on the repetitive nature of his charges to the Philippians. He has told them these things (from imitating Christ to avoiding false doctrine) from the beginning. By denying that he is tired of saying them, he is making clear that what he is saying is worth saying no matter how many times it needs to be said--probably one of the reasons he uses the repetitive form in chapter 4:4.

for you it is safe: The author of Hebrews uses the same word translated as "safe" here for "sure" in Hebrews 6:19. Paul's commands and teachings are intended to give the Philippians a doctrinal and practical anchor--the same thing his letter provides for believers now.

Expanded Paraphrase:
The rest of what I want to say can be summed up in my charge to you: Rejoice in the One over you, Christ. I have said all these things to you before to the point that you probably believe I am tired of saying them. But I am not. They are worth saying because you need an unfailing reminder of your position and purpose in Christ.