This was one of peters admonition to the church and it reads
11 My friends, that I love, you live as strangers in this world. You are like visitors, who are staying in this world only for a short time. So I ask you strongly not to do those bad things that your bodies may want to do. Keep away from things like that, because they are like enemies to you. They fight against what is good for you. They stop you from doing good things.
12 You are living among people who do not know God. So be careful that you do good and right things always. Sometimes these people may say that you do bad things. But you should continue to do good things. And then they will see that you are good. So, on the day when God visits us, they may thank God because of you. And they will say how great God is..
We ought to have a code of conduct and standard to live and relate with the unbelieving.
A nice post.