17 The former preach Christ out of selfish ambition, not sincerely, supposing that they can stir up trouble for me while I am in chains.

Read Philippians 1:17 Using Other Translations

But the other of love, knowing that I am set for the defence of the gospel.
The former proclaim Christ out of rivalry, not sincerely but thinking to afflict me in my imprisonment.
Those others do not have pure motives as they preach about Christ. They preach with selfish ambition, not sincerely, intending to make my chains more painful to me.