This section describes the mystery of Unity and the Trinity of the Triune God. The Holy Trinity is three in name, in person, in deed and one in essence, in divinity, in existence, in will.
The Father is the heart, the Son is the word and the Holy Spirit is the life (breath). The Father is the heart for Himself, and He is the heart for the Son and for the Holy Spirit. The Son is the word for Himself, and He is the word for the Father, and for the Holy Spirit. And finally, the Holy Spirit is the life (breath) for Himself, and He is the life (breath) for the Father and the Son.
Even though we say the Trinity are three in name, in deed and in person; the Holy Trinity is also One as well. They are one in:
When an Orthodox Tewahedo says they believe in the Holy Trinity, it is not to say they believe in three Gods but one God. While the Father and the Son and the Holy Spirit exist in their perfect person, they are one in existence. (Abulidis, Faith of the Father's Chap. 40 Verse 4:6).
Ignatius wrote in the Book of the Faith of the Fathers (Haymanote Abew) the name of the Father is not changed to be the name of the Son or the Holy Spirit. The name of the Son is not changed to be the name of the Father or the Holy Spirit, the name of the Holy Spirit is not changed to be the name of the Father or the Son. The Father is called Father but not the Son or the Holy Spirit. The Son is called the Son but not the Father or the Holy Spirit. The Holy Spirit is called the Holy Spirit but not the Father and the Son. The Father is the Father, the Son is the Son, and the Holy Spirit is the Holy Spirit. The three exist eternally in their own name and person. (Faith of the Fathers Ch. 11 part 1 Verse 7.8). In their name of unity, the three are called Lord, God Lord the Father, Lord the Son, Lord the Holy Spirit One Lord,God the Father, God the Son, God the Holy Spirit One God. The three hundred eighteen fathers in The Book of Faith (Haimanote Abew) said "we believe in Lord the Father, in Lord the Son, in Lord the Holy Spirit. (Hai Ab. Ch. 19 Part 1 Verse 30).
The Apostolic St. Athanasius Archbishop of Alexandria said that "The Father is God, the Son is God, the Holy Spirit is God. They are called one God but not three Gods.” (Apostolic Athanasius Faith of the Fathers Ch.24 Part 4 Verse 4).
It is stated in many places in the Old and the New Testament Books about the Oneness and Trinity of the Holy Trinity. Some of these include:
In the Old Testament:
Gen. 1:26; 2: 18; 3:22; 11:7; 18: 1-8; Ps. 33:6; 146:5; Isa. 6:3,8
In the New Testament:
Mt.3:16-17; 28:19; 1n.14:26; 2Cor.14:13; 1 Pet. 1:2;11n. 5:7-8
Symbolic Metaphors: The Sun
There are many ways that the mystery of the Holy Trinity can be symbolic. For example, often The Sun is used as a metaphor for Qdist Silassie or the Holy Trinity. The Sun can be described in three ways: its form, Light, and warmth (hot). Our fathers explain that its form is like the Father, the Light being the Son and the Warmth (hot) being the Holy Spirit. Just as one cannot separate the physical form of the Sun away from the light or warmth it gives, the same can be said of the Holy Spirit. Which the Holy Trinity describes as being the Father, the Son, and the Spirit; One cannot exist without the other two. The Holy Spirit is three while also being One.