The eternal beauty of the One true God is most wonderfully concentrated in the Son of His love, in whose face we see the heart of the Father revealed (John 14.5-13). Christ comes as God made man in order to show us who God is and, in so doing, to save us and to renew the entire cosmos, which was His creation to begin with (John 1.3). God the eternal Son, who was made flesh by miraculous divine action in the womb of the chosen Jewish maiden, the virgin, Mary, finds His essential identity precisely as eternal God. He is God the Son. He has a Father, the Lord God Almighty, with whom and in whom, in the ineffable bond of charity of the Holy Spirit, He mutually indwells and coinheres, one of three coequal, undivided, and yet distinct divine persons within the one being of God.
From: Systematic Theology: Grounded in Holy Scripture and Understood in the Light of the Church: Volume 2: The Beauty of Christ: A Trinitarian Vision by Douglas F. Kelly (Fearn, Scotland: Mentor, 2014), p. 13. The above quotation is the very first paragraph of the main text.