#سر الصليب ووحدة الجميع في الله

One God and Father of all, who is above all, and through all, and in you all.

— Epistle to the Ephesians, Epistle to the Ephesians, 4:6

For as we lost it (the Word) by means of a tree, by means of a tree again was it made manifest to all, showing the height, the length and the breadth in itself; and, as a certain man among our predecessors observed, through the extension of the hands He gathered together the two peoples to one God. For these were two hands, because there were two peoples scattered to the ends of the earth; but there was one head in the middle, as there is but one God, who is above all, and through all, and in us all.

— St Irenaeus of Lyons, Bishop of Lyons, Against Heresies, V, 17, 4 source

Concerning the Cross, this is what has come down to us from tradition, and this is what we learn from the shape of the Cross: it is divided into four arms, like four projections from the centre where they are joined together; for He who was stretched upon it at the time of the dispensation of His death is the One who binds all things together in Himself and brings them into harmony. He gathers the diverse natures of existing things, gathering them through Himself into one accord and harmony.

— St Gregory of Nyssa, Bishop of Nyssa, The Great Catechism, 32 source