It is easy to get confused about what Christian Behaviour should be. There are lots of “things we ought / ought not to do”, but they don’t always agree, and anyway, who says? Of course the Old Testament had commandments which gave a picture of what God was like, and liked. But they could mislead – some thought that just having the commandments made them better than other people, and in any case, they all made mistakes and failed to live perfectly.
Paul taught Christians (Jews or Gentiles) that they would get to heaven because their sin was forgiven by the grace of God, depending on the death of Jesus, and through the faith of the believer. But he then had to face the question (we are reading Romans 6:1-11), “So, why behave? If sins are forgiven, why worry?” Paul’s answer might be paraphrased “No way: Live for yourself, or live for Christ – but you can’t do both!”
I don’t have to tell you about living for yourself – we’ve all done it! It’s selfish, which means that we don’t enjoy the pleasures as much as we might, both because we may have hurt others to get them, and because we are looking over one shoulder to see who may be trying to take them away. It makes a world where you’re on your own, everyone against everyone else and pity help the weak. And if you live for yourself there’s always a problem with guilt and failure. You’re never going to reach God’s standards, and you probably won’t keep up your own, either.
So, what’s the alternative – to live for Christ. That doesn’t make us perfect; you may have noticed that Christians are still sinners. But it is a totally different motivation. As forgiven sinners, we work together with others who share this loyalty. They’re an odd lot, and sometimes it is rubbing along with them that rubs off some of our rough edges. But if we share a Master, we also have a real unity. This is a family which, though it can argue, has a very strong reason for living together.
There’s another benefit. The more we get into this service of Christ, the more like him we become. It’s one of the things the Holy Spirit does to us and with us; you may not notice, but other people will. What are we saying? A lot of people still make the mistake of thinking that Christian Behaviour is “being good” – getting a good score on keeping the commandments. That is a mistake.
Christian behaviour is all about serving Jesus, living for him. (Rather like the line in today’s gospel, Matthew 10:32,33 “If anyone declares publicly that he belongs to me, I will do the same for him before my Father in heaven. But if anyone rejects me publicly, I will reject him before my Father in heaven.” The question is “Who do you belong to?” and there is the same sharp division). Those commandments are still useful – they tell us things what God thinks is important, and warn us of dangers.
If you want to know how you are doing, don’t say “I wonder if 7/10 is a pass mark for keeping the commandments” but ask “How much of today did I live for Jesus, and how much did I really live to get my own way?”