We read in St. Matthew: "After Jesus was baptized he came directly out of the water. Suddenly the sky was opened and he saw the Spirit of God descended like a dove and hover over him. With that, a voice from heaven said,... (Mt 3:17)
clk to hear
Here St. Ambrose points out that the manifestation of the Spirit is said to be upon Christ as the Son of Man but in reality the Spirit is not upon Christ but in Christ because "the Father is in the Son, and the Son is in the Father, so the Spirit of God and the Spirit of Christ is both in the Father and the Son." 15
This mystery revealed by Christ was beyond human reasoning. The Word generated by the Father from all eternity came forth from the heart of God to make known to us the inner life of God.
Icon of Christ the Pantokrator courtesy of Fedor Strelsov, icon painter who lives and works in Moscow: http://icons.virtualave.net/
He goes on to unfold his life with His Father, "The Father possesses life in Himself, so has he granted it to the Son to have life in Himself. (Jn 5:26..) And "Believe me that I am in the Father and the Father is me...." (Jn 14:11) Furthermore, "I say only what the Father has taught me."(Jn 8:28) And "I tell you what I have seen in my Father's presence..." (Jn 8:38)
The Spirit as a divine distinct person was clearly stated by Christ before his ascension: "Go...and make disciples of all nations. Baptize them in the name of the Father, and of the Son, and of the Holy Spirit."(Mt. 28:19)