Yes, but how do you understand this?
as a Spirit that we can either manifest into the world, or not, and recognize in others, or not, without any verbalization needed at all. When one begins seeking Christ--or in our lexicon "gets saved"--they do not suddenly no longer need to eat or sleep, right. Meaning that they are still going to have plenty of opportunity to serve their flesh, or the Spirit, every day, for the rest of their lives.
i read "one who is in Christ no longer sins" too, but imo this is bait for narcissists who believe they were "saved" at the altar, and are now "in Christ" 24/7, which for all i know some people attain, but that certainly does not describe me, and it sure doesn't describe King David, so imo the passage is being read wrong.
If you are in Christ in your next decision, you are not going to sin, and if you are serving yourself, you are going to sin, and if you have been led to believe that some altar works in the past have "saved" you irrevocably for all time, no matter what you do, then don't even bother reading this. "Faith" does not mean "believing really, really hard, no finger-crossies."