After His resurrection, Jesus spent time with those whom He had chosen (John 15:16), providing instructions for the new form of the theocratic administration or kingdom (Mark 16:15). The basis of this instruction was the Kingdom now involved both the Jew and Gentile and the Holy Spirit would be with them and all believers (John 14:16).
Up until this point, God had centralized the authority of the theocratic administration to one individual or institute. Though, Pentecost argues
“in the present age He has divided authority in four different realms, thus limiting the area committed to any administrator in the kingdom. The responsibility of those administrators is the same in any previous form: to bring those under their authority into submission to God, to maintain law and order, and to provide an atmosphere in which men may live in peace because they are in subjection to appointed human authority and consequently to divine authority.”
The four realms he is referring to are civil government (Rom. 13:1-7), the home (Eph. 5:21-33), employer/employee (Eph. 6:5-9) and the church (1 Peter 5:1-7).