I believe all persons everywhere know God exists due to the inner testimony of conscience and the external testimony of creation (Rom 1:19-20). God’s existence is self-evident and the unregenerate must deceive themselves into the folly of atheism (Ps 10:4; Rom 1:25). We can never fully comprehend God (Ps 139:6) but we can truly know Him and about Him (Jn 17:3). We can know about His attributes, such as independence (Acts 17:24-25); unchangeableness (Mal 3:6); eternality (Jude 25); omnipresence (Ps 139:7-10); invisibility (Jn 1:18); omniscience (1 Jn 3:20); wisdom (Rom 16:27); truthfulness (Jer 10:10); goodness (Lk 18:19); love (1 Jn 4:8); holiness (Isa 6:3); righteousness (Rom 3:25-26); justice (Deut 32:4); jealousy (Ex 20:5); wrath (Jn 3:36); sovereignty (Eph 1:11); freedom (Ps 115:3); omnipotence (Matt 19:26); perfection (Matt 5:48); blessedness (Gen 1:31); beauty (Ps 27:4); unity (1 Jn 1:5).
I believe the one true God – the God of the Bible – is Triune. We can define the Trinity as three inner personal distinctions within one divine essence. The Trinity is therefore three distinct persons, yet one God. These three persons are equal; they are co-eternal and exist simultaneously. Each person of the Trinity fulfills a unique role: the Father originates, the Son reveals, and the Spirit executes. Scripture displays a pattern, wherein the Father plans and directs. The Father sends the Son (Jn 3:16; Gal 4:4) and the Spirit (Jn 14:26; 15:26) and they are obedient to His authority and will (Jn 4:34; 5:19; 6:38). The Son of God has always existed as the second person of the Trinity (Jn 3:13). The Son existed in eternal communion with the Father and the Spirit before the event of the incarnation (Jn 17:5, 24), wherein the Son took on human flesh (Jn 1:14) and was born to a virgin (Lk 1:35) as the God-Man Jesus of Nazareth (Matt 1:18-25). The Holy Spirit is the divine third person on the Trinity (Mt 28:19; 2 Cor 13:14). The New Testament authors associate the Holy Spirit with Yahweh (Is 6:1-13; Acts 28:25; Jer 31:31-34; Heb 10:15-17) and encounters with the Holy Spirit are interactions with God Himself (Mt 12:31-32; Acts 5:3-4).