This is good stuff, but it's not new. Meanness is ill will, a mental poison that will inevitably cause a person to harm others, but the very first victim is holder of the ill will. I think this was probably very well known even at the time of the Buddha 26 centuries ago. As I get older I seem to be realizing more and more how often we rediscover or reinvent ideas from the distant past. It may be unavoidable, because wisdom is hard to transmit via words.