I thought I might add a bit on this one, please correct me where I get it wrong. I think I am in agreement with Father peter, but if I am not please let me know I like to know the right information on this as well.my recolection of this teaching is very vague.
Genesis 6:3 “My Spirit shall not remain with these people forever, for they are flesh. So their days shall be one hundred and twenty years”
In our fall from grace we lost the grace of the Holy Spirit, although it remained available from outside of us, because of our lack of his grace we continued to succumb to the will of the flesh the world and the devil. Our will power to resist temptation was weakened thus we kept rejecting God’s grace. One might call it a vicious cycle of failure.
Galatians4:6-7 “And because you are sons, God has sent forth the Spirit of His Son into your hearts, crying out, “Abba, Father!” Therefore you are no longer a slave but a son, and if a son, then an heir of God through Christ.
Romans 8:9- 17 9 But ye are not in the flesh, but in the spirit, if so be that the Spirit of God dwelleth in you. But if any man hath not the Spirit of Christ, he is none of his. 10 And if Christ is in you, the body is dead because of sin; but the spirit is life because of righteousness. 11 But if the Spirit of him that raised up Jesus from the dead dwelleth in you, he that raised up Christ Jesus from the dead shall quicken also your mortal bodies through his Spirit that dwelleth in you.
12 So then, brethren, we are debtors, not to the flesh, to live after the flesh: 13 for if ye live after the flesh, ye must die; but if by the spirit ye mortify the deeds of the body, ye shall live. 14 For as many as are led by the Spirit of God, these are sons of God. 15 For ye received not the spirit of bondage again unto fear; but ye received the spirit of adoption, whereby we cry, Abba, Father. 16 The Spirit himself beareth witness with our spirit, that we are children of God: 17 and if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified with him.
The Logos Incarnate received the Holy Spirit in the flesh for our sakes, to make us receive the Holy Spirit in union with his humanity. The Holy Spirit did not come upon his divinity as if one is empty of the other or inferior than the other, it is not that the divine Logos by nature needed the help of the spirit, rather because of his incarnation it is fit that his humanity receive the Spirit for our sakes. However it is not in separation but in the hypostatic union that all this is done it is the Son that receives the Spirit in his humanity for us. For this reason both St. Cyril and St. Severus teach: we hear the testimony of the Father as scriptures say “the Holy Spirit descended on him in bodily form like a dove. And a voice came from heaven: “You are my Son, whom I love; with you I am well pleased.”Luke 3:21-22, He did not say here is my Son dwelling upon this man.” For the Father to say My Son, he was referring not in flesh but in referring to his Sonship by nature of his divinity that from all eternity was begotten from Him (the Father). Thus we are not talking about the Son by nature being lacking somehow thus needing the Spirit to assist him for his work God forbid we would say such a thing! But rather the Son of God while one with the Spirit Himself, received the Spirit in his humanity for our sakes, that we also may be able to receive the spirit in our union with him. We get baptized with sanctified life giving water, so we might be revivified and transfigured in union with him in death and in life. The First Adam became a living soul; the Last Adam became a life giving spirit.
As the spirit descended on the son in baptism the Spirit also descends on us and makes us by adoption sons of the Father in our union with the Son.
Why water was used for his baptism?
As St. Cyril and St. Severus teach it is to make the waters of this world holy. And To fulfill the words of scriptures that say” I will sprinkle clean water on you, and you will be clean; I will cleanse you from all your impurities and from all your idols” Ezekiel 36:25, as water is needed by all and given for all, be it the king that sits on his throne or the poor man on the street in the same manner baptism is established for all. As water purifies baptism also purifies. As that which is taken away by water does not leave track/ trace in the same manner the sin that is forgiven and washed away by baptism will not be used for judgment as it is washed without a trace. As water acts like mirror and also revitalizes the flesh, baptism also shows the condition of the soul and revitalizes her. A cloth that is washed with water is heavy and strong in the same manner in baptism the faithful find the grace to increase in glory and be strong in virtue. As the potter whose pot gets cracked while working at it will break and remake it by mixing it the clay with water. In the same manner baptism is the giver of regeneration. Water was used by God to execute his judgment upon those who rebelled against him for this reason many have called water as an instrument of destruction; however our Lord being baptized in water showed us that water manifests God’s Mercy.
The Scripture says then the havens opened unto him (John). We know that there is no opening or closing for the skies by their nature. However it is to say that the mystery is now revealed as a gate is opened to show what is inside it, now a mystery that was unrevealed before is now revealed. The mystery of the Holy Trinity! Thus we call it Epiphany.
16 And Jesus, when he was baptized, went up straightway from the water: and lo, the heavens were opened unto him, and he saw the Spirit of God descending as a dove, and coming upon him; 17 and lo, a voice out of the heavens, saying, this is my beloved Son, in whom I am well pleased. Matthew 3:16-17
Here we see the Holy Spirit as a dove, because dove is meek and forgiving, The Holy Spirit is forgiving. As in the time of Noah the dove brought the good news of the passing of the destruction the beginning of new life by brining the olive branch, the Holy Spirit proclaims the hope of the Cross. As a dove other than as a result of the destruction of her nest will not abandon her nest even if they crash her eggs, hit her wings, the Holy Spirit too will not abandon a person for sinning unless completely rejected and denied.
I guess I should stop here .