The Ecclesiological Chapters of St Justin Popović, 1–5.

1. What is grace (1 Cor. 1.3)? – Grace is the divine operations (ἐνέργειαι) which the All-Holy Trinity provides to the Church for the salvation of men from sin, death, and the devil; and for eternal life in the tri-subsistential God (τρισυπότατος Θεός).

2. The witness to Christ is confirmed in you (1 Cor. 1.6). What is this witness about? It is about God as Trinity, about the God-Man as Saviour, about man as a deiform being (θεοειδὲς ὄν), about the Church as a divine-human body, about salvation as a divinο-humanisation (θεανθρωποποίησις), about each thing created as a rational creature (ὡς λογικὸν δημιούργημα).

3. Our communion (1 Cor. 1.9) with the Saviour Christ constitutes salvation: Communion with him, as the Sanctifier, is sanctification. Communion with him, as God, is deification. Communion with him, as the Immortal, is immortality. Communion with him, as the Resurrected, is the resurrection. Communion with him, as the Ascended, is ascension and the sitting at the right hand of God the Father.

4. I beseech you … that you all speak the same thing (1 Cor. 1.10). Christians can all speak the same thing, when they have the same sensations, the same thoughts, the same lived-out experiences (βιώματα). They attain this when they unify their soul with the catholic soul of the Church, their heart with the catholic heart of the Church (cf. Acts 4.32), their intellect (νοῦς) with the catholic intellect of the Church, and their thought with the catholic thought of the Church. Then they think and feel and speak by the catholic soul of the Church, its catholic heart of the Church, and its catholic thought.

5. For we cooperate with God (Θεοῦ γάρ ἐσμεν συνεργοί – 1 Cor. 3.9). The ideal of the true and perfect man is realised in the Person of the God-Man, with divine-human cooperation (συνεργεία). This divine-human cooperation, constituted through the divine-manly (θεανδρική) body of the Church, becomes the common property (κτῆμα) of men and their common mode of life, thought, action, and existence. In the Church, men are concorporated (συσσωματοῦνται) with the God-man Christ, i.e. they are born with him and through him; they are transfigured with him and through him; they are co-crucified with him and through him; they are co-resurrected with him and through him; they participate in his ascension; and through him they live eternally in him and through him; they think in him and through him; they sense in him and through him, they act with him and through him. In the this catholic divino-humanisation of man there lies precisely his salvation and sanctification. It was for this purpose that the human race was created, and it was in this joyful synergy with God that the paradisiacal life of our forefathers consisted. The fall occurred, when we rejected this synergy and began through sin to work and co-work with the devil … Sinning, we work willingly or unwillingly with the devil. God the Word became man to restore the life of Paradise, and the order of life in him, i.e. cooperation with God.