What-is-God
Short answer: The Bible answers the question of what God is by telling us who He is. At the burning bush, Moses asks for God's name, and God answers with the name Yahweh, explaining it as I AM WHO I AM (Exodus 3:14). That name speaks of self-existence, eternity, and covenant faithfulness. God is not a vague force, an impersonal energy, or a projection of human wishes. He is the living, personal, holy Creator who made everything, rules everything, and draws near to save. Scripture describes Him as spirit (John 4:24), as one (Deuteronomy 6:4), as eternal King (1 Timothy 1:17), and as the Alpha and the Omega (Revelation 1:8). Everything Christians believe flows from this revealed identity.
God gives Moses His name at the burning bush
Exodus 3 opens with Moses keeping his father-in-law's flock near Mount Horeb. He sees a bush burning without being consumed and turns aside to look. God calls him by name from the bush and tells him He has seen the affliction of His people in Egypt. This is not a distant deity checking in. God says He has come down to deliver them, and He intends to send Moses as His messenger to Pharaoh.
Moses immediately senses the practical problem. He will return to a people who have lived for generations under Egyptian slavery, surrounded by Egyptian gods with names and titles. If he announces that the God of their fathers has sent him, they will want to know this God's name. Moses asks in Exodus 3:13, what should I tell them? He is not being evasive. He is asking for a real answer about identity and authority.
God does not rebuke the question. He answers it. The God of Abraham, Isaac, and Jacob is not nameless. He reveals Himself by name, and that name carries weight for every generation that follows. The rest of Scripture keeps returning to this moment as the foundation for knowing who God is and why He can be trusted.
I AM WHO I AM means God is self-existent
Exodus 3:14 records God's reply: I AM WHO I AM. The name is tied to the verb for being. It tells Moses that God is not dependent on anything or anyone for His existence. He did not come into being. He was not created, elected, or assembled. He simply is, and everything else exists because He wills it to.
This sets the God of the Bible apart from every rival. Ancient nations worshiped gods who were born, who fought, who died, and who needed food and favor from their worshipers. Israel's God needs nothing. Psalm 90:2 says that before the mountains were brought forth, from everlasting to everlasting, God is God. He is the ground of all being, not a participant in it.
Because God is self-existent, He is also unchangeable in His character. He does not grow tired, learn, or improve. His power does not fluctuate. His love does not fade. When He makes a promise, nothing outside Himself can force Him to break it. That is why the name revealed at the bush becomes the anchor for Israel's hope and for ours.
Yahweh is the God who is present with His people
The name Yahweh is not an abstract philosophical label. It is a covenant name, spoken in the context of rescue. God tells Moses that He has seen the misery of His people and heard their cry, and that He has come down to deliver them. The one who is eternal and self-existent is also the one who draws near to slaves in Egypt.
This is a pattern that runs through the whole Bible. The transcendent God is not absent. He walks with Enoch, speaks with Abraham, wrestles with Jacob, and leads Israel through the wilderness. Later, He takes on human flesh in Jesus Christ. The name revealed in Exodus is the name of a God who is near, not merely a God who is far off.
Psalm 90:1 calls the Lord a dwelling place for all generations. The eternal God becomes a home for mortal people. Knowing what God is, then, is never merely a matter of correct definition. It is a matter of relationship. The God who is can be trusted, addressed, and loved, because He has made Himself known and stays near to those who call on Him.
God is spirit, invisible, and not a physical object
Because God revealed His name, some might be tempted to think they can capture or contain Him. Jesus corrects that in John 4:24: God is spirit, and those who worship him must worship in spirit and truth. God is not made of matter. He has no body parts, no physical location, no visible form that can be boxed into a shrine or manipulated by a ritual.
1 Timothy 1:17 calls Him the King eternal, immortal, invisible. That does not mean He is unreal or distant. It means He is not subject to the limits of created things. He cannot die. He cannot be seen with physical eyes apart from His own self-disclosure. He does not age or decay. The invisible God is still the most real being there is.
This is why idolatry is so serious in Scripture. To fashion a statue and call it God is not merely a mistake about detail; it is a reversal of reality. The Creator is not an image made by creatures. He is spirit, and He must be worshiped on His own terms, in spirit and truth, not according to our preferences or our attempts to manage Him.
God is one, and He is eternal King
Deuteronomy 6:4 declares, Hear, Israel: Yahweh is our God. Yahweh is one. This confession, known as the Shema, stands at the center of Israel's faith. Israel is surrounded by nations that worship many gods, and God's people are called to a different loyalty. There is one God, not many. He is not one among a pantheon. He alone is God.
That oneness does not mean He is merely a single power or principle. The rest of Scripture reveals Him as Father, Son, and Holy Spirit, three persons who are one God. Christians have historically confessed this as the Trinity. The Bible does not explain the mystery in a way that removes it, but it does speak of Father, Son, and Spirit in personal terms, each fully God, together one.
Because God is one, He is not divided in His purposes. He is not part mercy and part wrath, not part loving and part indifferent. His attributes are perfectly unified. What He does flows from who He is. His unity is the ground of His faithfulness, and it is why His people can trust Him without reservation.
God is the Alpha and the Omega, the beginning and the end
Revelation 1:8 records God saying, I am the Alpha and the Omega, who is and who was and who is to come, the Almighty. Alpha and Omega are the first and last letters of the Greek alphabet. God is saying that all of history begins in Him and ends in Him. He is not a figure within time; He stands over it. He is the one who was, who is, and who is to come.
This is the same God who spoke to Moses. The I AM of Exodus is the Alpha and Omega of Revelation. He is not a tribal deity with a limited territory. He is the Almighty, sovereign over every nation, every power, and every moment. Nothing surprises Him. Nothing escapes His rule. Nothing can prevent Him from completing what He has begun.
When the Bible calls God eternal, it is not simply saying He lasts a long time. It is saying He is the source and goal of everything. He has no beginning and no end, and all things hold together in Him. That is why hope is possible even in suffering: the story is not ultimately in human hands.
What knowing God is not
Scripture is clear about what God is not. He is not a force we can harness, a machine we can operate, or a cosmic principle we can master. He is not a bigger version of us, only stronger and older. He is not one option among many spiritual paths. The God of the Bible is the holy Creator, and He is not obligated to conform to our expectations.
Knowing God is also not merely knowing facts about Him. It is possible to have accurate information and still not know Him. Jesus said that eternal life is knowing the only true God and Jesus Christ whom He sent. Knowledge of God in Scripture is relational: trusting, obeying, worshiping, and walking with Him. Doctrine matters because it shapes the relationship, but doctrine alone is not the relationship.
Faithful Christians have differed on how to explain some of these things. The doctrine of the Trinity has been expressed in different formulas. The relationship between God's sovereignty and human responsibility has been debated for centuries. What unites believers is not perfect agreement on every explanation, but worship of the one true God who has revealed Himself in Scripture and in Christ.
Why this matters for everyday life
If God is self-existent, eternal, holy, and near, then He is worth trusting when life is hard. Psalm 23 speaks of the Lord as shepherd, leading His people through valleys, not around them. The God who revealed His name at the burning bush is the same God who walks with His people through loss, fear, temptation, and uncertainty. He is not absent when we suffer; He is present.
Because God is spirit, we do not need a special place, object, or technique to reach Him. We come through Jesus Christ, in spirit and truth. Because He is one, we do not need to hedge our bets or divide our loyalties. Because He is eternal King, we do not need to panic at the rise and fall of nations. The God who spoke to Moses still speaks in Scripture.
Knowing what God is, then, is not an academic exercise. It changes how we pray, how we face death, how we treat others, and how we endure. The God who is I AM has made Himself known, and He invites His people to know Him in return.
Biblical fidelity check
Exodus 3:13-15 establishes that God has a name, that He reveals it to Moses, and that the name is tied to His self-existence and His covenant with the patriarchs. It does not give a complete systematic theology of God's nature. It does not explain the Trinity, describe God's physical appearance, or answer every question about His relationship to time. Those come from the rest of Scripture, read together. The passage also does not suggest that God's name is a magical formula to manipulate Him. It is a revelation of who He is, not a tool for controlling Him.
A common misreading is to treat I AM WHO I AM as a bare statement of abstract existence, as if God were merely the universe or a generic life force. That is wrong because the same passage shows God speaking, seeing, hearing, remembering His covenant, and sending Moses. He acts and relates. He is personal. Another misreading is to treat Yahweh as one national god among many, as if Israel simply had their own deity. Deuteronomy 6:4 rules that out: Yahweh is one, and He alone is God over all. The passage establishes a personal, self-existent, covenant-keeping God, not a vague cosmic principle.
Other passages that speak to Exodus 3:13-15
Exodus 3:13-15 does not stand alone. The Bible's teaching about God is woven through many passages that echo and expand on the name revealed at the burning bush. For a broader look at how creation itself testifies to God's power and nature, see Natural revelation and what creation reveals about God: A Biblical Guide. For the courage that comes from knowing God is with us, see What does 2 Timothy 1:7 mean about fear?. For the life that the self-existent God gives to His people, see What does John 10:10 mean by abundant life?. And for the nearness of God as shepherd and dwelling place, see What does Psalm 23 mean for Christians today?.
Frequently asked questions
What does the name I AM WHO I AM mean?
The name reveals that God is self-existent and eternal. He is not made, dependent, or limited by anything outside Himself. When God says I AM WHO I AM, He is answering Moses' question about identity and authority with a name that speaks of underived being. He simply is, and everything else exists because of Him. The name also connects to the covenant with Abraham, Isaac, and Jacob, showing that this is the same faithful God who has been at work all along and will continue to be with His people.
Is God a person or an impersonal force?
Scripture presents God as personal, not as an impersonal force or energy. In Exodus 3, God sees, hears, speaks, remembers His covenant, and sends Moses. He acts with purpose and enters into relationship. John 4:24 says God is spirit, which means He is not physical, but it does not mean He is less than personal. He knows, wills, loves, and judges. The God of the Bible can be addressed, trusted, and worshiped because He is a living, personal being, not a blind power or a cosmic law.
Why does it matter that God is one?
Deuteronomy 6:4 declares that Yahweh is one. This matters because it rules out idolatry and divided loyalty. Israel was surrounded by nations worshiping many gods, and the Shema called them to exclusive devotion to the one true God. It also means God is not divided in His character or purposes. His mercy and justice are not at war. He is perfectly unified, perfectly faithful, and wholly worthy of trust. Christians confess this same one God as Father, Son, and Holy Spirit.
