The unity of the True Church of God is not only a past or future event, it is a present and actual reality. This is one of the best demonstrates teachings, in the New Testament, but also one of the most neglected. Why is so neglected? Because many see a possible threat to the stability of the religious institutions and prefer not to speak at all about that. What are then the biblical foundations for the thesis that, at the present time, there is, in fact, One true Church of God and many religious institutions?