The Church consists of the [[prophet]]s and [[saint]]s of both the Old and New Covenants, the [[angels]] and the concrete, historical community of believers in this earthly life, past and future generations, in one and the same grace of God . It is both visible and invisible, both divine and human. It is visible, for it is composed of concrete congregations, worshipping here on earth; it is invisible, for it also includes the saints and the angels. It is human, for its earthly members are sinners; it is divine, for it is the Body of Christ. Not unlike the [[ incarnation]].
There is no separation between the visible and the invisible, between (to use western terminology) the ''Church militant'' and the ''Church triumphant'', for the two make up a single and continuous reality. The Church visible, or upon earth, lives in, complete communion and unity with the whole body of the Church, of which Christ is the Head. Orthodoxy, therefore, while using the phrase 'the Church visible and invisible,' strongly insists that there are not two Churches, but one. ( The term is only in relation to man.) The boundaries of the Church are ultimately known only to God himself, but outside the historical context of the Church—that is, the Orthodox Church—the nature of the connection of any human being to the Church (whether a believer in Christ or not) is unknown to us. Throughout [[ Church History]], various groups have broken from the Church, a tragic reality which does not divide the Church but rather divides believers from the Church. The final status of Christians in such communities is dependent on God's mercy and [[ grace]], as is the case with those with membership in the Church in this life.