I was reading in Romans recently when I came to 1:15. Paul writes to the Roman church, "So I am eager to preach the gospel to you also who are in Rome."
When Paul normally talks about preaching, he is referring to proclaiming the gospel to the lost. This is what we see in his practice as well. In light of what verse 14 says, we sense that verse 15 refers at least in part to his preaching to the pagans in Rome.
However, in 1:15 the apostle clearly writes that he is eager to preach the gospel "to you also who are in Rome." Since he is communicating with the church, he must also be talking about preaching to his fellow brothers and sisters in Christ. When Paul uses the word "you" in his letters, he is almost always talking about the church he is writing to.
This surprised me because in the NT we almost always see preaching aimed at the lost. Here we see Paul intending to preach to the saved. Why would he desire to do this? What's his plan and purpose?
My guess is that he simply wants to ensure that they fully understand the gospel and share with them what God has been doing in other places. Paul undoubtedly, based on other things he writes, desires to encourage and be encouraged by them as well.
Still though, he talks of preaching to the saved. This seems outside the norm for him. Any ideas on the significance of this?