Are you preaching modalism which is considered heresy by the Church before the Council of Nicea in 325 AD? Modalists believe that there is only one God with three different masks or roles (Father, Son, and Holy Spirit).
No, I believe the NT teaches what might be termed "relationalism" as follows:
The OT Shema (DT 6:4) teaches that God is one, and the NT also affirms that there is one God (EPH 4:6, 1TM 2:5). However, the NT teaches that God relates to believers in three ways simultaneously: as the Father, as the Son and as the Holy Spirit (1x1x1=1).
The Father/Parenthood of God is indicated in Jesus’ model prayer (MT 6:9), throughout the Gospel of John (3:35, 5:17-18, etc.), and in the epistles of Paul (RM 4:11, 8:15, PHP 2:11). God the Father and
Christ’s Sonship are discussed in Hebrews 1:1-4. The Son of God also is mentioned by John (JN 1:14, 3:16, etc.) and by Paul (RM 1:4, GL 2:20, 1THS 1:10). The
Holy Spirit is mentioned in three successive chapters in John (JN 14:26, 15:26, 16:13), frequently in the book of Acts (ACTS 1:5, 2:4, 9:17, 13:2, 19:2), and in many of Paul’s letters (RM 8:4-26, 1CR 6:19, EPH 4:30) as well as in some of the other epistles (2PT 1:21, JUDE 20).
Apparently, Christians failed to explain to
Mohammed (c. 610) how God is able to relate to Himself and to creation as a Triunity, and so the prophet’s teaching stressed that there is one God and implied that the Christian gospel is false. It might have been helpful for him and others who stumble at NT doctrines to discern which aspect of the triune God is the subject of various biblical statements.
These divine aspects or “persons” may be distinguished by role or ways of relating to humanity: God the Father as creator or initiator (GN 1:1), God the Son as Messiah or mediator (1TM 2:5), and God the Spirit as indweller (RM 5:5). For example, 1 John 4:7 says love comes from (is initiated by) God (the Father), Galatians 5:22 says that love is a fruit of the (indwelling) Spirit, and Ephesians 3:18 speaks of the (mediating) love of Christ (RM 5:8, EPH 2:18).
We can denote these distinctions and relationships by the use of three prepositions: God the Father is over all creation (EPH 4:6), God the Son is Immanuel or with humanity (MT 1:23), and the Holy Spirit is within all believers (EPH 1:13). A single passage that comes closest to indicating this distinction is Ephesians 3:14-19, in which Paul prays to the Father that through His Spirit of love Christ would dwell in believers’ hearts (also see 1CR 8:6).
When the Bible uses masculine words for God, it should be understood that only God the Son is human and had a sexual orientation while on earth. GN 1:26-27 states that both male and female were created in God’s image, referring not to androgyny but to personality, and Jesus said (in MT 22:30 & 19:11-12) that there is no marriage and thus no need for sexuality in heaven.
Actually, since the creation also manifests God (RM 1:20, cf. JN 1:1-3 & PS 33:6), in a sense God may be viewed as a “Quadity”. As Paul told the Athenians (ACTS 17:28), “In Him we live and move and have our being.” God as Creation is throughout physical reality (called “panentheism”). However, since this mode of revelation is impersonal, it has been de-emphasized by most Christian denominations.