Aaron's Rod that bloomed blossoms

In this text, God proves by a rare miracle that Aaron, his sons, and the tribe of Levi are the only ones God called to the priesthood. It is no doubt curious to us, why God would go about to show this, this way...yet this is how He said it should be done.
Apparently it was not enough that God spoke to them through Moses time and again declaring that Aaron and the house of Levi were the only ones permitted to serve in the office.
So God uses something very simple, and does something simply amazing with it.
God declares through this miracle, that HE is responsible for calling men into His service. That HE is the One that decides who will serve Him about the Holy Things.
And so it is today. Men do not rightly call themselves to the ministry. Nor do others call them to the ministry…God calls them to the ministry…and HE will equip the ones He calls.