This has definitely been a subject that has been debated, written, discussed about. Thankfully there are many resources about this topic, including references from the bible. Let us look at some verses that refer to the oneness of God:
Isaiah 37:20 “Now therefore, O Lord our God, save us from his hand, that all the kingdoms of the earth may know that thou art the Lord, even thou only.”
Isaiah 45:5 “I am the Lord, and there is none else, there is no God beside me: I girded thee, though thou hast not known me”
Deuteronomy 6:4 “Hear, O Israel: The Lord our God is one Lord”
Deuteronomy 4:35 “Unto thee it was shewed, that thou mightest know that the Lord he is God; there is none else beside him.”
Revelation 1: 8 “Unto thee it was shewed, that thou mightest know that the Lord he is God; there is none else beside him.”
John 10:30 “ I and my Father are one.”
There are many more bible verses that tell of God’s oneness. What is important to note is that this is a vital doctrine especially as apostolic believers in the Lord Jesus Christ. The basic idea is that there is only one God and that God is one. God is essentially numerically and singularly one. He is one single yet a complex being.
The Many Attributes Of God
God has indeed many other names and descriptions because these are the ways how He chooses to manifest and interacts to the world. He manifested Himself to Moses face to face (Exodus 33:11), to the rest of the world through Jesus Christ (Philippians 2:6) and to us the A.D. Christians through the Holy Spirit (John 14:16).
Because of these many names and descriptions, it would seem like He is all too powerful to be everything in anything. God actually has many specific attributes just as any human being would. The only difference is He is God. And so while God is God, He is also the Spirit as stated in John 4:24 (KJV) “God is Spirit, and those who worship Him must worship in Spirit and in truth.” Jesus Christ as well is the image of the invisible God. While God is invisible, He has shown us who He is in Jesus Christ (Philippians 2:6 Who, being in the form of God, thought it not robbery to be equal with God.)
How are all of these these even possible? For God to be Jesus and Spirit at the same time? Let us then look at the many attributes of God that will lead us to conclude that God, Jesus and the Holy Spirit are one.
Below is a more detailed list of His attributes with references that support His oneness.
God is Eternal (Psalms 90:1-2; Timothy 6:16)- This means that God is the Alpha and the Omega. He has no beginning or no end and He is everlasting.
God is Omniscient (1 John 3:20)- This means that God knows everything and that He knows what will happen yesterday, today and tomorrow. His eyes searches the every corner of the world to whose hearts are after Him.
God is Omnipotent (Jeremiah 32:17)- This means that God is a very powerful God in that He can do anything.
God is Omnipresent (Acts 17:24)- This means that God is everywhere all at the same time. This may sound even bizarre but this attribute simply shows His power in that He is able be present everywhere.
God is immutable (Malachi 3:6)- God is the only constant thing and He alone is perfect. He is not subject to change.
God is just (Psalms 89:14)- God always knows what He is doing when exacting justice and though we may not understand it, we must believe that He is always doing what is right and best for us because He is just.
God is love (Jeremiah 31:3)- This means that His love for His children knows no end and that it is pure and holy just as He is. His love as well is very intense in that it is unconditional and everlasting.
God is truthful (Psalms 31:5, John 16:13)- This means that when God says something, He will do it because He is always true to His words. His promises and prophecies are always true and has never failed us.
God is holy (1 Samuel 2: 2, Luke 1:49)- This means that God is morally upright. While He is loving, He also hates sin and that is why He is holy.
What is glorious about this is that with all of these attributes of God, in His immense and unconditional love for us, He came down from heaven, down into man’s world, incarnated Himself through Jesus. John 1:14 ‘And the word was made flesh and dwelt among us (and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth.) Jesus’ name itself denotes how God longs to be in fellowship with us: Emmanuel- meaning God is with us. And why would an All-Knowing and All-Powerful God do this? Because He is love and His love is indeed vast and everlasting.
It is but normal to be somehwhat overwhelmed at first, when trying to understand the Godhead. After all, we are just mortal beings with finite wisdom. In fact, we are no different from some apostles who were with Jesus physically themselves.
Furthermore, we read in John 14 two disciples who were in need of proof from Jesus. Thomas, known as “Doubting Thomas” inquired of how to get to where Jesus was going while Philip, another disciple who wanted proof that could satisfy him, asked Jesus to show him the Father. Even when Philip walked with Jesus, he was still unable to grasp that Jesus was God in the form of man. But instead of being angry at His’ disciple’s ignorance or dismissing Philip away, Jesus took time to lovingly explain to Philip in verses 9 to 14 in which He said “Have I been so long time with you, and yet hast not thou known me, Philip? He that hath seen me hath seen the Father; and how sayest thou then, show us the Father? Believest though that I am the Father, and the Father in me? The words that I speak unto you, I speak not of myself: but the Father that dwelleth in me, he doeth the works. Believe me that I am the Father, and the Father in me: or else believe me for the very works sake. Verily, verily, I say unto you, He that believeth on me, the works that I do he shall do also; and the greater works than these shall he do; because I go unto my Father. And whatsoever ye shall ask in my name, that will I do; that the Father may be glorified in the Son. If ye shall ask anything in my name, I will do it.” In the last verses, Jesus even goes as far as telling Philip that he can ask anything in His name, as if saying that “Your God is just right here in front of you Philip! Go on, ask in my name!”.
This kind of response from Jesus is very reassuring indeed. That not only does He lovingly reveal Himself to us in many ways, but that he goes as far as even reassuring us many times, over and over again, that in Him, there is truth, freedom and blessing. What Philip did not see in that moment of questioning was that the presence of God right in front of him was perhaps the biggest blessing of it all- to come face to face with Jesus Christ and be His disciple! That in itself should have been enough for Apostle Philip.
At certain times we can be like Philip too – always asking for reassurance so that we may be satisfied. Yet we fail to see that God has already revealed Himself to us in so many ways.
A simpler way to put it would be like this: Adam was made in the image of God and therefore you can better understand the Godhead by viewing the Godhead throughout the paradigm of a man. A man can be a Father, A Son, and A Husband with 3 distinct roles but this does not make him unique persons or entities.
The same with God- He is the father in creation, the son in redemption and the Holy Spirit in the church today. This truth can be found in 2 Corinthians 5:19 (KJV) “To wit, that God was in Christ, reconciling the world unto Himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation.”
Just like what Jesus did with Philip, He will unceasingly, lovingly and tirelessly reveal Himself to us, and that we as Christians will always have His presence in our lives.