Who can comprehend the nature of God? Of course, only God Himself...
Who can comprehend the nature of God? Of course, only God Himself. But what is essentially important for our salvation, He reveals to us. Therefore, the Church has always tried to be precise in comprehending this Revelation, so it is necessary to clearly envision what is important for our coming to God.
The idea of the created nature of Jesus Christ was first expressed by the Alexandrian priest Arius at the beginning of the 4th century AD. The Church quite unanimously rejected this opinion as erroneous, because if it was not God who shared our life and our death with us, then there is no salvation from sin and death for us. Likewise, if the Holy Spirit is a faceless force (a sort of semolina porridge, God forgive me), then communion with a Personal God is impossible for us. In this case, again, there is no salvation, because the entire biblical faith collapses. After all, the Holy Spirit is precisely the One Who pours life into our hearts, and not in some Hellenistic "afterlife existence" (which is a non-biblical idea), but here and now. Thus, the Church believes that Jesus is the God-Man, consubstantial with the Father in His Divinity and consubstantial with us in His humanity, and the Holy Spirit is a Person, God, whom we worship together with the Father and the Son.
The arguments you write about do not seem convincing. Of course, Jesus prays—how else can a man (and God incarnate in a man as well) communicate with the Father? The manner of communion between the Father, the Son, and the Spirit in the Trinity is incomprehensible to us; but the God-Man Jesus Christ is humbled for our sake to such an extent that He also shares our manner of communion with the Father. As for the worship of Jesus Christ, the Holy Scripture says that it is precisely the belief that He is Lord that gives a person salvation. The Apostle Paul in his Epistles to the Romans ( 10:9), to the Philippians ( 2:6-11), and to the Colossians says that the will of God regarding our salvation is that we worship God in Jesus Christ, since "in Him dwells all the fullness of the Godhead bodily" ( 2:9). Obviously, the opinion of Arius regarding the created nature of the Son of God radically contradicts these last words of the apostle.
The Holy Spirit, of course, can act in every person, and in many people at once, for He is Almighty! And the "divided tongues, as of fire" are only visible signs of His coming, not He Himself. Ultimately, I reply to letters from many people—does my personality thereby divide into separate pieces of paper?
It is truly important for us to know and accept what is expressed in the dogmatic teaching of the seven Ecumenical Councils, including the concept of the Trinity, first explicitly formulated by St. Theophilus of Antioch in the second half of the 2nd century. The Triunity of God means for us that He a) is not like us; b) transcends us and our understanding; c) has life in Himself; d) gives us the opportunity to share with Him the fullness of His life. This is in brief, of course. The Church's teaching on the Triune God is profound and significant enough to become acquainted with it through the Bible itself and specialized sources.
Everyone, of course, is free to choose their own confession. But it is important for Christians to remember that every dogmatic assertion has consequences in practical spiritual life, and these consequences must be seen and evaluated by their fruits.
10
10:1 My prayer to God is, that they may be saved - He would not have prayed for this, had they been absolutely reprobated.
10:2 They have a zeal, but not according to knowledge - They had zeal without knowledge; we have knowledge without zeal.
10:3 For they being ignorant of the righteousness of God - Of the method God has established for the justification of asinner. And seeking to establish their own righteousness - Their own method of acceptance with God. Have not submittedto the righteousness of God - The way of justification which he hath fixed.
10:4 For Christ is the end of the law - The scope and aim of it.It is the very design of the law, to bring men to believe in Christ for justification and salvation. And he alone gives that pardon and life which the law shows the want of, but cannot give. To every one - Whether Jew or gentile, treated of, Rom 10:11, etc That believeth - Treated of, Rom 10:5.
10:5 For Moses describeth the only righteousness which is attainable by the law, when he saith, The man who doeth these things shall live by them - that is, he that perfectly keeps all these precepts in every point, he alone may claim life and salvation by them. But this way of justification is impossible to any who have ever transgressed any one law in any point. Lev 18:5
10:6 But the righteousness which is by faith - The method of becoming righteous by believing. Speaketh a very different language, and may be considered as expressing itself thus: (to accommodate to our present subject the words which Moses spake, touching the plainness of his law:) Say not in thy heart, Who shall ascend into heaven, as if it were to bring Christ down: or, Who shall descend into the grave, as if it were to bring him again from the dead - Do not imagine that these things are to be done now, in order to procure thy pardon and salvation. Deu 30:14.
10:8 But what saith he - Moses. Even these words, so remarkably applicable to the subject before us. All is done ready to thy hand. The word is nigh thee - Within thy reach; easy to be understood, remembered, practised. This is eminently true of the word of faith - The gospel. Which we preach - The sum of which is, If thy heart believe in Christ, and thy life confess him, thou shalt be saved.
10:9 If thou confess with thy mouth - Even in time of persecution, when such a confession may send thee to the lions.
10:10 For with the heart - Not the understanding only.Man believeth to righteousness - So as to obtain justification.And with the mouth confession is made - So as to obtain final salvation. Confession here implies the whole of outward, as believing does the root of all inward, religion.