Everybody else already said it, but I'll just add a note.
There are stories like "Facing the Giants," where it preached the story, while Narnia just tells the story.
Although I am a Christian, I hate watching Christians films, as they were often done poorly. Movies like Narnia, the Bible series, Exodus, and Lord of the Rings, they were pretty much done right, as it was telling the story.
If I want to hear a sermon, there are pastors or the actual Bible. If I want to check out a story, there are medias of all forms that I can look.
In my story, Legend of the Crusading Artist, the character is a Christian, but that is not the main focus of the story. The focus is about his journey as an artist, through skills alone or with help (whether supernatural or physical). There may be some "Easter Eggs" that I'll throw in, and at the end, I could explain the easter egg with the verses. Throwing in a snipbit of verses can be fun, as it may either encourage the reader to check it out or throw in good moral lesson for others.
I have one verse that might sound silly, but for the story, it'll be radically funny.