The Results of Mixing Authorities

In the early days of the Church, bishops (overseers) began to give to themselves additional authority. They decided to have archbishops over groups of bishops. Inverting God's order that authority comes from above, these archbishops chose to put over themselves cardinals and finally a pope. Such organization loses sight of the sovereignty of the Lord in raising up those who should take the oversight to administer in the house of God locally. It is man usurping the Lord's authority in His house.
When Constantine converted to Christianity, he used his power as emperor to set up a worldly rule in the Church. He mixed the Church with the world and in the process mixed the two authorities as well. What confusion he introduced by mixing God's civil authority with His authority in His house. The mixture was not of God at all. It was complete ruin for the Church.
Through Constantine the world ruled in the Church. Through the pope the Church started to rule in the world and still does. If you notice what happens in the world, you know that Rome has great power in many nations to rule religiously and politically. It's a horrible mix-up, worse now than in Constantine's day. We need to leave authority where God has put it and submit to it.
Don't interfere in the headship of a man with his wife. A man has authority over his wife and they have a beautiful relationship; leave them alone. Don't try to interfere between parents and their children. They have beautiful responsibility and privilege in that relationship, and you have no business to assume authority in it at all, nor does the assembly. The assembly is not to rule in the home, and the wife is not to rule over the assembly, over her head, or over civil authority.
While authorities are not to be mixed, they may have to deal with the same person at the same time. But each must do so only within the sphere of its own God-given authority. Suppose a boy living at home robs a bank. His father may discipline him in the home. The assembly may have to put Him away from the Lord's Table. The local government may have to put him in jail. But notice that none have the authority to do what the other can and should do. And none of the authorities are to try and set aside or interfere with the authority of the others.