first thanks for the response. but I must disagree with your assessment. #1. I don't believe that the Holy Spirit is a angel. #2. the Lord Jesus and the Spirit are not two distinct beings, but the equal share of the one true God, the HOLY SPIRIT. and here's why I say this. John 1:1 "In the beginning was the Word, and the Word was with God, and the Word was God". the WORD here is our Lord and Saviour Jesus the Christ. and second to support this, God is a Spirit, scripture, John 4:24a "God is a Spirit".
now that we have a "general" understanding that the Lord Jesus and the Holy Spirit are not two distinct beings, but really the diversified, or share of the same source (Spirit) whom we call God. now as to your OP, "This study goes over the events related to the second coming in correlation to the Jewish festivals and old testament prophecies". I'm of the understanding and belief that the Lord Jesus return is a two fold return. one in Spirit, (on the day of Pentecost). and his second of his two fold returns in Bodily form, (which is yet to come). if that's true then the time of the trumpet blasts of the seventh seal, and to the future time of the new heaven and new earth is at HAND, or is already in effect.
God is not a pie to be divided, God is one, as it is written, "The LORD is one". As such, just as it is said that God is a consuming fire, God is also Spirit. Yet he is not literally fire, but rather, fire describes a quality of God to consume and destroy, just like Spirit describes a quality of God to be
invisible, hence why he is called the "invisible God", for "spirit" means "wind", since there is no distinction between both words in the Greek and in the Hebrew. Jesus Christ was indeed a spirit of God before he came in the flesh, and that was his identity in the beginning, "the spirit of God hovered above the waters", and it was this Spirit that spoke, "let there be light...", and that also all life came through his speech, hence why he is also called "the Word in the beginning", and also why it is declared, "the spirit of God made me". Yet he is not the only Spirit that existed, nor exists, for every angel of God is also a Spirit, for angels are not just able to take the form of fire, hence the angel that spoke to Moses as fire within a burning bush, but they are able to take the form of wind, which is the form of Spirit, and thus be invisible to the eye, and also enter inside a man through his breath. And so, any holy angel that takes this form, is then called "holy spirit", hence why the angel that Isaiah spoke of was called a "holy spirit". It is your doctrine of the trinity taught by your churches that causes confusion concerning the holy spirit, concealing the truth that he is indeed an angel, behind the lie that is is some third omnipresent being like the Father, which is simply not so. This is why it is declared, "the spirits of the prophets are subject to the prophets", because each prophet is indwelt by one singular holy spirit that causes him to prophesy. And it was when he ascended to heaven, that he sent angels, in the form of Spirit, to guide the elect that remain on the earth.
The Deception of the Teaching of the Trinity | Wisdom of God