It’s a question that has driven wedges between believers since the early days of the Church: what are the most important rules that we have to follow in order that we might be considered real Christians?
Some of the rules do vary – depending on the time in history you are in and/or the denomination or sect to which you belong. Whether it’s what you wear, the sports you’re interested in or even sporting facial hair, someone, somewhere has a drawn a spiritual line around it.
Keep to the line and you’re ok – cross it and you’re living in rebellion. Even today, a Southern Baptist has different interpretations on some matters of behaviour compared to someone who is a member of a Baptist Church in the UK.