Moses was not great because of who he was. He became great, because he was both obedient and humble - the most humble man alive at that time according to scripture. That roughly coincides with justice and mercy.
I retired after 31 years teaching elementary school in Alpine School District. I also spent 8 years in the Utah State Legislature.
After retiring, I taught 5th grade at a charter school for a year, spent another year teaching English in China, and again taught at the charter school for two years.