Depending on how you decipher the relationship Moses has with Miriam and Aaron, they may be the brother and sister (and prophetess) to Moses.
Consider your “layman’s” position in the church. Here and in life you are evaluated or judged by that relationship and how you reflect His kingdom.
Do you add to the Godly wisdom of the church or do you degrade it?
Earlier in this book Moses was not selfishly concerned about others being praised, whom were professing the message of God.
God wants us all to take part in a “lay ministry” inside and outside the church. He might even bless you beyond Your expectations! Yet it is our pride that gets in the way of our God given potential.
Aaron and Miriam are our example of how not to advance the gospel. Build up your brother and minister to those whose pride is leading their heart and not God.