Php 1:27 Only let your conversation be as it becometh the gospel of Christ: that whether I come and see you, or else be absent, I may hear of your affairs, that ye stand fast in one spirit, with one mind striving together for the faith of the gospel;
Php 1:28 And in nothing terrified by your adversaries: which is to them an evident token of perdition, but to you of salvation, and that of God.
Php 1:29 For unto you it is given in the behalf of Christ, not only to believe on him, but also to suffer for his sake;
Php 1:30 Having the same conflict which ye saw in me, and now hear to be in me.
Here Paul exhorts them to do well, asking of them that their conversation be worthy of Jesus. "Conversation" now means primarily oral conversation, but at the time it would have involved all of their conduct. The Thayer definition has it as "to be a citizen," or "to administer civil affairs, manage the state." So in all that they did, he wanted them to do it in a manner to glorify God. He asks them to work together for the faith.
He says not to be afraid of those who persecute them, as that persecution will take their enemies to perdition and them to salvation. Christians are called to suffer for the sake of the truth and for Jesus. Paul is living that out at the time of the letter.