What is Monotheism and why should I believe it?

What is Monotheism and why should I believe it?


Monotheism is defined by Merriam-Webster dictionary as, “the doctrine or belief that there is but one God”. In general the largest monotheistic religions found in the world today are: Christianity, Judaism, & Islam. The followers of these religions believe that there is one supreme God who deserves all worship and glory. This article will focus predominately on the aspect of Christian monotheism and how the Bible supports this belief.


While there are many arguments against this belief as well as other various religions throughout the world that do not practice monotheism this article will not cover those. As stated previously, the intent of this article is to show that monotheism is indeed a Biblical truth throughout the entire Bible.


The concept of one divine being is not something that a few men in a room devised and claimed to be a fact about God. The Bible gives us numerous accounts throughout its entirety that prove monotheism to be an infallible truth of the Bible.


Old Testament theology supports this assertion as well. In Deuteronomy 6 Moses declares to all those in Israel the foundational elements of their religion.


“Hear, O Israel: The Lord our God is one Lord: And thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might. And these words, which I command thee this day, shall be in thine heart: And thou shalt teach them diligently unto thy children, and shalt talk of them when thou sittest in thine house, and when thou walkest by the way, and when thou liest down, and when thou risest up. And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes. And thou shalt write them upon the posts of thy house, and on thy gates.”

– Deuteronomy 6:4-9 KJV


Moses knew this statement to be true because of his own personal encounter with God in Exodus 3.


“And God said unto Moses, I Am that I Am: and he said, Thus shalt thou say unto the children of Israel, I Am hath sent me unto you.”

– Exodus 3:14 KJV

God reveals to Moses who He is in a singular definition, “I AM that I AM”. People everywhere use the term I am when defining who or what they are. A man of Caucasian decent may say, “I am white” when asked his ethnicity. A schoolteacher when asked her profession would reply, “I am a teacher”. The possibilities and scenarios in which how and why one would reply in this manner are endless. But, God is an exception to the rule. You see God is infinitely indefinite. God is savior and healer both simultaneously and infinitely. There are not limits to His power nor His roles. Yet, if there were one thing that God most certainly would be, it’s that He is God alone.


“Unto thee it was shewed, that thou mightest know that the Lord he is God; there is none else beside him.”

– Deuteronomy 4:35 KJV


“See now that I, even I, am he, and there is no god with me: I kill, and I make alive; I wound, and I heal: neither is there any that can deliver out of my hand.”

– Deuteronomy 32:39 KJV


“Wherefore thou art great, O Lord God: for there is none like thee, neither is there any God beside thee, according to all that we have heard with our ears.

– II Samuel 7:22 KJV


“For thou art great, and doest wondrous things: thou art God alone.”

– Psalm 86:10 KJV


Throughout the Bible another theme that is found quite often is the term Holy One when referencing God.


“Whom hast thou reproached and blasphemed? and against whom hast thou exalted thy voice, and lifted up thine eyes on high? even against the Holy One of Israel.”

– 2 Kings 19:22 KJV


“I will also praise thee with the psaltery, even thy truth, O my God: unto thee will I sing with the harp, O thou Holy One of Israel.”

– Psalm 71:22 KJV

“But when he seeth his children, the work of mine hands, in the midst of him, they shall sanctify my name, and sanctify the Holy One of Jacob, and shall fear the God of Israel.”

– Isaiah 29:23 KJV


“For thus saith the Lord God, the Holy One of Israel; In returning and rest shall ye be saved; in quietness and in confidence shall be your strength: and ye would not.”

– Isaiah 30:15 KJV


“For I am the Lord thy God, the Holy One of Israel, thy Saviour: I gave Egypt for thy ransom, Ethiopia and Seba for thee.”

– Isaiah 43:3 KJV


“For Israel hath not been forsaken, nor Judah of his God, of the Lord of hosts; though their land was filled with sin against the Holy One of Israel.”

– Jeremiah 51:5 KJV


“Saying, Let us alone; what have we to do with thee, thou Jesus of Nazareth? art thou come to destroy us? I know thee who thou art, the Holy One of God.”

– Luke 4:34 KJV



The Bible says that man was made in the image of God. Upon first understanding one would determine we “look” like God. Yet, God is a spirit he does not look like anything. He can manifest Himself in various forms but He does not have an inherent physical image.


So, what does it mean to be made in the image of God? One could imply that being made in the likeness of God refers to being made in the same likeness of God’s spirit. As we have discussed God is a singular spirit. This is further made evident that man is also a singular spirit. Every individual on planet earth has one body and one spirit. While individuals can operate in various roles: husband, wife, father, daughter, and friend. A person is still only a singular being.


The same likeness is found in God. God is a singular being yet he can operate and manifest Himself through various roles. In the Old Testament God took on the roles of a cloud by day and a fire by night to lead the Israelites out of Egypt (Exodus 13:21). Is God an actual cloud or really fire? No, these were manifestations God took on for the purpose of leading the Israelites. In the New Testament God manifested Himself in flesh as the man Jesus taking on the role as our savior.


Jesus is the only begotten Son of God.


“For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.”

– John 3:16 KJV


Yet, the Bible says that Jesus was born of the Holy Ghost. But throughout the New Testament and even today Jesus is referred to as the Son of God.


“And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.”

– Luke 1:35 KJV


“Now the birth of Jesus Christ was on this wise: When as his mother Mary was espoused to Joseph, before they came together, she was found with child of the Holy Ghost.”

– Matthew 1:18 KJV


“But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost.”

– Matthew 1:21 KJV


In John 14 and 16 before Jesus’ ascension into Heaven he tells those around Him of a Comforter that will come after Him. In His conversation with those around Him Jesus places Himself in every role of asking, sending, and being the Comforter. Today, we know the Comforter as being the Holy Ghost. The same Holy Ghost that Jesus was born by. Yet, in John 14:18 Jesus says, “I will not leave you comfortless: I will come to you.” Further validating that God (The Father), Jesus (The Son), and the Holy Ghost (Holy Spirit) are not just in one accord but are actually one divine entity.



“And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;”

– John 14:16 KJV


“I will not leave you comfortless: I will come to you.”

– John 14:18 KJV


“But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.”

– John 14:26 KJV


“Ye have heard how I said unto you, I go away, and come again unto you. If ye loved me, ye would rejoice, because I said, I go unto the Father: for my Father is greater than I.”

– John 14:28 KJV


“Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.”

– John 16:7 KJV


These verses given are only a small portion of the vast amount of verses that the Bible gives to support monotheism. It is my hope that those who have read through this article have strengthened their belief and revelation of the Oneness of God. Yet, it is improper to approach any Biblical revelation from a scholarly mindset. The only true way to properly understand God’s divine nature comes in humbly submitting oneself to reading and searching the verses of the Bible and allow God to open your understanding.


Hebrew 11:6 says it like this…


“But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.”


We should believe monotheism because it is a truth that the Bible has plainly laid out before us. Yet, it is not something one should handle light heartedly. I encourage anyone to search and read the Bible for themselves in order to gain a revelation that God will revel to them.


“To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:”

– Colossians 1:27 KJV


“And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.”

– 1 Timothy 3:16 KJV