God in Three Persons—Blessed Trinity
What is the doctrine of the Trinity? The one true God exists in a Trinity of persons. In the Godhead, there is one God who eternally exists in three distinct, coequal, and coeternal persons. These divine persons are inseparable from the divine being. Because in the unity of the Godhead, the Father, Son, and Spirit are permanently existing in one another, with absolute unity of essence. In fact, the trinal distinction of persons, the mutual interpenetration within the Godhead, and the absolute deity of the Father, Son, and Spirit are what sets Christianity apart from all other world religions.
"The grace of the Lord Jesus Christ, and the love of God, and the communion of the Holy Spirit be with you all. Amen." - 2 Cor. 13:14
Refuting Trinitarian Heresies
Oneness Pentecostals undeniably reject the ἐγὼ εἰμί (“I AM”) statements in Scripture. In John 8:58, Christ said, “Most assuredly, I say to you, before Abraham was [aorist. γενέσθαι; lit. had a beginning] I AM” [ἐγὼ εἰμί; lit. without a beginning]. But Oneness advocates deny the preexistence and eternality of the Son, the trinal distinction of persons in the Godhead, and the absolute deity of the Father, the Son, and the Spirit. This is an insurmountable problem for Unitarians who don’t believe that Christ predates time and creation or that God is multi-personal. Pray that the Lord will deliver them from this bondage. Christ’s warning to the Jews explains why (notice the I AM statement): “Therefore I said to you that you will die in your sins; for if you do not believe that I am He, you will die in your sins” (John 8:24, emphasis mine).
Christology may seem vexing or abstruse, but it is not difficult to grasp the Chalcedonian summarization of the faith. The Κύριος Ἰησοῦς Χριστὸς (“Lord Jesus Christ”) is one person (hypostasis) who possesses two natures—wholly God and wholly man (hypostatic union). The person of the Son, who is homoousios [homo: same + ousios: substance] with the Father, became incarnate. Christ’s divinity and humanity were indissolubly joined. During His earthly ministry, the μονογενὴς θεὸς (“begotten God”) had exercised the fullness of His divine attributes, to include His omniscience and omnipresence. Heretics and liberals will disagree. Many of them who hold to kenotic or sub-kenotic views, which allege that Christ either divested Himself (ἐκένωσεν) of His deity or only had restricted access to the divine attributes during His earthly pilgrimage—which is clearly unbiblical—because the fullness of the θεότητος (“Godhead”) dwells in the exalted Christ (Col. 2:9). All doctrines that reject the person of the Son, the dual nature and full deity of Christ, or the unity and plurality of the Godhead, must be condemned as heresy.
Chalcedonian Christology—Christ does not know the day or hour/Christ knows all things
If you have not studied the orthodox Chalcedonian doctrine of the hypostatic union, you will not be able to understand or rightly teach, in my opinion, how Christ can “know all things” (John 16:29-30) but not know the “day or the hour” (Matt 24:36). If you are relying on commentaries from popular preachers, you may be disappointed. They may not understand historic Christology either. Don’t be lazy! Study church history. Then you will learn how to properly explain how the μονογενὴς θεὸς (“begotten God”) is "consubstantial with the Father according to the Godhead and consubstantial with us according to humanity." Affirming the person of Christ, who is both God and man simultaneously, is not a trivial matter. It is an essential of the Christian faith. May the Lord open our eyes to behold the truth about the doctrine of the person of Christ. Amen.
God is the author of justification. Those whom God foreknew, He predestined, and justified. Sinners, chosen by the Father, are justified by saving grace that is particular, not universal. The grounds of our justification is Christ’s righteousness (extra nos) that is not imputed to everyone, but only to the elect. And the instrument by which God justifies the elect is through faith alone in Christ alone, whom God set forth to be a propitiation for the elect.
The true gospel [viz. good news] is an actual atonement, not the potential one that Arminians believe. Biblically, Christ died for all of the elect. Therefore, all of the elect for whom Christ died are guaranteed redemption, reconciliation, and His righteousness is imputed to them. The Arminian gospel is a false gospel because it obstinately alleges that Christ loved and died for everyone in the entire world. However, we know this to be false because everyone in the entire world will not be saved, and many will be separated from Christ on the Day of Judgement.