However, these are all rather secondary points compared to the main one. As we remember, the central dogma in Islam is the assertion of monotheism. Surah 112 of the Qur'an is considered to be the most accurate expression of it: "Say: 'He - Allah - is one, Allah, eternal; He did not begat or be begotten, and none was equal to Him!'" (Qur'an 112:1-4).

Here the author of the Qur'an consciously separates the Islamic concept of God from the Christian one, where, on the contrary, God is revered as the Begetter (Father), the Begotten (the Son) and the Outgoing (the Holy Spirit): "We confess that God is one, that is, one essence, and that He is known and exists in three hypostases; that is, in the Father, and in the Son, and in the Holy Spirit, and that the Father, and the Son, and the Holy Spirit are in all things one, except the unbegotten, and the birth, and the procession."9

Elsewhere in the Qur'an, the polemics with the most important Christian dogmas about God – the Trinity and the Incarnation of God – appear even more vividly:

"O Owners of the Scriptures! Do not superfluous in your religion, and do not speak against Allah except the truth. After all, Jesus Christ, the son of Mary, is only the Messenger of Allah and His word that He threw to Mary, and His spirit. So believe in Allah and His Messengers, and do not say "three." Hold on, this is the best for you, Indeed, Allah is only one god. He is more praiseworthy than to have a child" (Qur'an 4:171). "How shall He have a child, since He had no mate, and when He created all things?" (Qur'an 6.101)

"Those who said, 'Allah is the third of the three' did not believe, whereas there is no other deity but the one God. And if they do not refrain from what they say, a painful punishment will affect those of them who do not believe" (Qur'an 5:73).

"And they said, 'The Merciful One has taken a son.' You have done a vile thing! The heavens are about to be dissolved because of this, and the earth will be opened, the mountains will fall to dust because they have ascribed a son to the Merciful. It is not fitting for the Merciful to take a son for Himself. Whoever is in the heavens and on earth comes to the Merciful only as a servant" (Qur'an 19:88-93).

At the same time, as can be seen, the author of the Qur'an expounds the Christian teaching about God erroneously, which reaches its climax in the idea that the Christian Trinity consists of God, Jesus Christ and the Virgin Mary: "And then Allah said: 'O Jesus, son of Mary! Did you say to the people, "Accept me and my mother as two gods besides Allah?" (5.116).

This is a glaring mistake, since Christians did not teach to take Jesus as a separate deity other than the One God, much less teach the divinity of the Virgin Mary.

A person who draws knowledge about the Christian faith from the Koran will receive the most erroneous idea that has nothing to do with reality.

And the reality is this: first of all, Christianity asserts that God is a Person. And that there may be a personal relationship between God and every human being, determined by divine love: "God loves us more than a father, mother, or friend, or anyone else can love, and even more than we can love ourselves, because He cares more for our salvation than even for His own glory, as evidenced by the fact that He sent His only begotten Son into the world to suffer and die only for the sake of to open to us the way of salvation and eternal life" (St. John Chrysostom).

God is the highest and most perfect Being, the Creator and Ruler of the universe, the eternal Spirit, omnipresent, omniscient and omnipotent.

In His essence God is incomprehensible to the human mind: He dwells in an unapproachable light, which no man has seen or can see (1 Timothy 6:16), His mind is unsearchable (Isaiah 40:28) and immeasurable (Psalm 146:5).

But man constantly strives to know God. This desire is observed among people of all peoples and cultures. Obviously, there is something in the very nature of man that draws him upward. Christianity calls this "the image and likeness of God" in man (Genesis 1:27). Only the presence of this kinship between the soul and its Creator can explain why sometimes people without any religious education, under the most unfavorable conditions, gradually acquire quite correct ideas about God.