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Thanks!

How does good character develop in the first place then..?

I always try to work with people smarter than me, more ethical than me, and more productive. When we associate with people we want to fit in with, we adapt to be more like them. We can adapt in bad ways, but we can also adapt in good ways.

Essentially, on some level we never stop the role-model based adaptation we did as children, when we modeled our behavior on what our parent(s) did.