We believe in one God eternally existing in one essence, yet three co equal persons, the Trinity: Father, Son and Holy Spirit.
Eternally existing: There is but one God (Deuteronomy. 6:4; Isaiah 45:5-6,14,18,21-22; Mark 12:29 32), Who has no beginning and no ending (Ps. 90:1-2; Gen. 1:1).
Three in One: God is one in essence, yet three persons, co-equal, eternally existing (Mat. 28:19; Eph. 4:4-6; Rev. 1:4; John 12:26; 15:26; 16:15; 1 Peter 1:2; Acts 2:32-36; I Cor. 12:3-6, II Cor. 13:14).
Co-equal: The Bible tells us that the Father is God (John 6:27; Rom. 1:7). The Son is recognized as God (John 1:1; 20:28; Heb. 1:8; I John 5:19-27; Phil. 2:6). The Holy Spirit is also identified as God (Mat. 28:19; Acts 5:4,9).