We believe in the Holy Trinity, as One God. The Lord Christ taught us this principle of faith by saying, “Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit” (Matthew 28:19). Believing in One God is the first of the Ten Commandments. The Lord says, “I am the Lord your God… You shall have no other gods before Me” (Exodus 20:2, 3), “Hear, O Israel: The Lord our God, the Lord is One…” (Deuteronomy 6:4; cf. 5:6, 7). These words are quoted by Christ as the first and greatest commandment (Mark 12:29). The Prophet Isaiah mentioned this fundamental fact of faith many times in His book, such as, “I am He. Before Me there was no God formed, nor shall there be after Me” (Isaiah 43:10, 11; cf. 44:6, 9; 46:9; 48:12).
Both the Old Testament and the New Testament mention the oneness of God. St. John says, “For there are three who bear witness in heaven: the Father, the Word, and the Holy Spirit; and these three are one” (1 John 5:7). St. James says, “You believe that there is one God. You do well. Even the demons believe and tremble!” (James 2:19). The apostle means the intellectual faith not the inner actual faith. He who does not believe in One God is lower in faith than the devils!
God is the One who is perfect and absolute life, simplicity, goodness, truth, love, wisdom, knowledge, and purity. He is the perfection and super-perfection of everything that man knows as holy, true, and good. He is ineffable, inconceivable, invisible, incomprehensible, ever-existing and eternally the same.
Oneness and Trinity
We do not believe in the plurality of God, but in one God. Some may wonder, how the three can be one? According to mathematics 1+1+1=3 and not 1; but according to the same rules 1x1x1=1 not 3. The Lord Christ says, “The Father is in Me, and I in Him” (John 10:38), “I and My Father are one” (John 10:30). We are not polytheists; we believe in no other gods. The Holy Trinity does not mean plurality of gods, but means peculiarities of the One Godhead.
With the Intellect (the Son) and the Spirit (the Holy Spirit), God is One Being. Man, created in God’s image, is a being with intellect and spirit; and the three are one. Likewise, fire, for example, with the heat and light coming out of it are one; and the sun is also one with its heat and light. The Father is the Godhead; the Son is the utterance of God’s intellect or the wise Word of God, i.e. God’s Wisdom (1 Corinthians 1:23, 24); and the Holy Spirit is God’s Spirit. God and His Spirit are one; and God and His intellect are one; and the three are one.
God is not Seen
God the Father is not seen by anyone, as St. John says, “No one has seen God at anytime. The only begotten Son, who is in the bosom of the Father, He has declared Him” (John 1:18). Moses wanted to see God, but He told him, “You cannot see My face; for no man shall see Me, and live” (Exodus 33:20). We cannot see the Father, but we can see Him in His incarnate Son, who came in the likeness of men (1Timothy 3:16; Philippians 2:7, 8). It was the Son who appeared in the Old Testament because no one has seen the Father. “When the fullness of the time had, God sent forth His Son, born of a woman, born under the law, to redeem those who were under the law, that we might receive the adoption as sons. And because you are sons, God has sent forth the Spirit of His Son into your hearts, crying out, ‘Abba Father!’” (Galatians 4:4-6).