Here the maiden exclaimed: Marvellous! I swim in the Godhead like an eagle in the air. The servitor, resuming his exposition, continued: It is impossible to express in words how the Trinity can subsist in the unity of one essence. Nevertheless, to say what may be said on the subject, Augustine says that in the Godhead the Father is the Fountain-head of the Son and the Holy Ghost. Dionysius says, that in the Father there is an outflowing of the Godhead, which naturally communicates itself to the Word or Son. He also freely and lovingly pours Himself out into the Son; and the Son in turn pours Himself out freely and lovingly into the Father; and this love of the Father for the Son, and of the Son for the Father, is the Holy Ghost. This is truly said, but it is made clearer by that glorious Doctor of the Church, St Thomas, who says as follows: In the outpouring of the Word from the Father's heart, God the Father must contemplate Himself with His own mind, bending back, as it were, upon His Divine essence; for if the reason of the Father had not the Divine essence for its object, the Word so conceived would be a creature instead of God; which is false. But in the way described He is "God of God." Again, this looking back upon the Divine essence, which takes place in the mind of God, must, in a manner, produce a natural likeness; else the Word would not be the Son of God. So here we have the unity of essence in the diversity of Persons; and a clear proof of this distinction may be found in the word of that soaring eagle St John: "The Word was in the beginning with God."