filled with the fruit of righteousness that comes through Jesus Christ, to the glory and praise of God.This verse is a continuation of the reasoning for Paul's prayer. He prayed in Philippians 1:9 that their "love would abound more and more in knowledge and all discernment." In Philippians 1:10, he begins to tell us why: when they make that divide in those life choices of what really matters, they will be making the right decision. This, in turn, will lead them to stand before God unashamed.
(Philippians 1:11, ESV)
Now he completes that reasoning, honing in, not just on ourselves and our benefit, but on those ultimate ideas: to be useful and productive for Christ and to bring glory to God. We will make God look supremely valuable as we love more and more and others see that love that we have for one another.