Finally, my brothers, rejoice in the Lord. To write the same things to you is no trouble to me and is safe for you.
(Philippians 3:1, ESV)
"Finally..." not meaning that this is near the end of his letter, but that these are his final thoughts. Once again, he comes back to joy. "Rejoice in the Lord." he says.
What he is about to talk about, is nothing new to the Philippians, but he wants to make sure they don't tune him out... what comes next is something they could, and maybe should, hear again and again.