If anyone keeps on doing bad things, it shows that they belong to the devil. The devil is the boss over all the bad spirits. Everything he does is bad. Yes, he always did bad things, right from the time when God made everything. So if anyone keeps on doing bad things, it’s like they are one of the devil’s kids. The devil always gets people to go wrong, but you know, God’s son Jesus came to earth to stop the devil’s work for ever.