(one's) good self

1. old-fashioned Oneself. Typically used to add polite emphasis. It has been so lovely to spend time with Lucy and your good self. You must stay a fortnight next time. I hope she does not involve her good self in this scheme. I hadn't seen his good self in such a long time, but he seemed well.

2. The virtuous, morally upright part of one's identity or personality. It took many years of self-reflection to get to the point where my good self was making more decisions than my bad self. I lecture the kids all the time about listening to their good selves, but it hasn't done much to keep them from getting into trouble. I doubt that even the worst man still has his good self.