We believe that the kingdom and the church are one and the same, and that the borders of the kingdom do not extend beyond the Church of Christ. (Mat 16:18-19; 1 Cor 15:24; Col 1:12-13).
And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven (Matt. 16:18, 19).
The popular thinking of the religious world today is that the terms “church” and “kingdom” are not necessarily the same thing. Most of the denominational world is still looking for the kingdom to come.