There are some who through disobedience destroy themselves, but each one of us should be an example, even to the believers. Even the believers need an example otherwise they go off the right way. If you want to know if someone is a Christian ask the heathen. They read us. You're a letter read by everyone, so be a letter of Christ to the people. You're a letter not written with ink but on the hearts of people. May it be a letter from God. There are few people reading the Bible, but everyone sees our lives.