In Philippians chapter 1, Paul is addressing the disunity at the church at Philippi. Just like the church at Galatia, there were Jewish believers who wanted to bring the Law of Moses back as a requirement to the believers at Philippi. Paul is speaking to this issue.
14 And many of the brethren in the Lord, waxing confident by my bonds,
are much more bold to speak the word without fear. 15 Some indeed
preach Christ even of envy and strife; and some also of good will: 16
The one preach Christ of contention, not sincerely, supposing to add
affliction to my bonds: 17 But the other of love, knowing that I am
set for the defense of the gospel.
Paul is writing this letter from prison. In verse 14, he says that there a brothers in the Lord that have become more confident in preaching their version of the gospel without fear of correction since they know that Paul is in prison.
Verse 15 lays out a contrast: some preach a message of envy/strife and some preach a message of good will. In verses 15-16, the references to envy/strife/contention/no sincerity is the exact same theme as Paul is addressing in the Book of Galatians. Remember, the entire Book of Galatians deals with the Judaizers wanting to bring the requirement to keep the Law of Moses to the Galatian church. In chapter 5:
14 For all the law is fulfilled in one word, even in this; Thou shalt
love thy neighbour as thyself. 15 But if ye bite and devour one
another, take heed that ye be not consumed one of another. 16 This I
say then, Walk in the Spirit, and ye shall not fulfil the lust of the
flesh. 17 For the flesh lusteth against the Spirit, and the Spirit
against the flesh: and these are contrary the one to the other: so
that ye cannot do the things that ye would. 18 But if ye be led of the
Spirit, ye are not under the law.
In Chapter 5, Paul contrasts living by the law and living by faith/grace. He says that living by the law is akin to living in the flesh and living by faith/grace is akin to living in the spirit. He says the two are contrary one to another.
He states that all the law is bound up in the truth “thou shall love the neighbor as thyself” BUT if you “bite and devour on another….”, meaning that if you leave love, ie leave living by mercy/grace through faith and return to the law, you return to a life of strife, contention and envy. He then lists strife and envy as part of the works of the flesh (works of the law) in verses 19-21 and he returns to the idea of contention/strife/envy in verses 25-26:
25 If we live in the Spirit, let us also walk in the Spirit. 26 Let us
not be desirous of vain glory, provoking one another, envying one
Paul brings this same concern over this false message of works by some believers in Philippi, using the same references to envy, strife and contention.
Philippians 1:15-16: 15 Some indeed preach Christ even of envy and
strife; and some also of good will: 16 The one preach Christ of
contention, not sincerely, supposing to add affliction to my bonds:
In verse 16 Paul says that the one group of believers preach the Christ of contention and not in sincerity. This is the plain reference to the false gospel of works of the law. Paul then comments that this preaching adds “affliction to my bonds.” , signifying that the preaching of this false message compounds his suffering for now he has mental agony to his physical bondage. The word “affliction” is the Greek word THLIPSIS. This word means to add pressure or suffering due to circumstances, anything that burdens the spirit.
Dealing with this issue of the false gospel of works was a huge point of suffering for Paul for all you have to do is to read his passion in Galatians chapter 1 and his reference to being accursed (twice), as well as Acts 20 where he says that he warns new believers day and night with tears.
6 I marvel that ye are so soon removed from him that called you into
the grace of Christ unto another gospel: 7 Which is not another; but
there be some that trouble you, and would pervert the gospel of
Christ. 8 But though we, or an angel from heaven, preach any other
gospel unto you than that which we have preached unto you, let him be
accursed. 9 As we said before, so say I now again, if any man preach
any other gospel unto you than that ye have received, let him be
29 For I know this, that after my departing shall grievous wolves
enter in among you, not sparing the flock. 30 Also of your own selves
shall men arise, speaking perverse things, to draw away disciples
after them. 31 Therefore watch, and remember, that by the space of
three years I ceased not to warn every one night and day with tears.
32 And now, brethren, I commend you to God, and to the word of his
grace, which is able to build you up, and to give you an inheritance
among all them which are sanctified.