God is a Trinity

Today I’m sharing another of John MacArthur’s “God Is” posts from his Grace to You blog. You can read God Is here, God Is One here, and God Is Spirit here.

God is a Trinity

by John MacArthur

Why does the doctrine of the Trinity matter to us today? And why have so many great Christians throughout church history fought so tenaciously in defending it? The answer is fundamentally rooted in one critical question: Do we know God?

Jesus said that knowing God is synonymous with having eternal life (John 17:3). And if we define Him on any terms other than how He has defined Himself in Scripture, we are nothing more than idolaters. That is why sects like the Jehovah’s Witnesses and Mormons are regarded as cults. To inherit eternal life, we need to know God as He truly is. And the biblical testimony is clear: There is one God. He eternally exists in three persons. And all three persons are each fully God.

To put it another way, God is three distinct persons in one indivisible substance. In the words of the Athanasian Creed,

The Father is God, the Son is God, and the Holy Spirit is God. And yet they are not three Gods but one God. [1]

And in this Trinity none is before or after another; but the whole three persons are co-eternal together and co-equal. So that in all things, the Unity in Trinity and the Trinity in Unity is to be worshipped. [2]

The simplest way to comprehend the Trinity is to read the Bible from the beginning to the end. The word for God in Genesis 1 is “Elohim.” It is plural. The im ending on a noun in Hebrew is like s in English. The opening words of Genesis could be translated, “In the beginning, Gods.” The word-form of the noun is plural, and yet the reference is to a singular being. The description of God throughout the Old Testament is clearly to a singular being. The verb that goes with Elohim in Genesis 1:1 is likewise singular.

The benediction God gave Moses for the priests to use seems to allude to the Trinity. Three times they were to invoke the blessing of the Lord. Numbers 6:24–26 records it: “The Lord bless you, and keep you; the Lord make His face shine on you, and be gracious to you; the Lord lift up His countenance on you, and give you peace.” The threefold appeal to “the Lord” suggests the Trinity. The seraphim Isaiah saw and described in Isaiah 6 cried to one another with this threefold exclamation: “Holy, Holy, Holy” (Isaiah 6:3). Again, it seems to be an allusion to the Trinitarian nature of God.

One of the clearest Old Testament references to the Trinity is Isaiah 48:16, a prophetic verse spoken by Jesus Christ. It puts all three members of the Godhead together in one verse: “And now the Lord God has sent Me, and His Spirit.”

Repeatedly the New Testament refers to the Father, Son, and Holy Spirit together in the same passage, on the same level. In Matthew 3 we are told that as Jesus was being baptized, the Holy Spirit descended as a dove, and the Father said, “This is My beloved Son, in whom I am well–pleased” (Matthew 3:17). In John 14:16–17, Jesus says, “I will ask the Father, and He will give you another Helper . . . that is the Spirit of truth.” Jesus told His disciples to baptize “in the name of the Father and the Son and the Holy Spirit” (Matthew 28:19). In 1 Corinthians 12 the apostle Paul says, “Now there are varieties of gifts, but the same Spirit. And there are varieties of ministries, and the same Lord. There are varieties of effects, but the same God” (1 Corinthians 12:4–6). The final verse of 2 Corinthians says, “The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit, be with you all” (2 Corinthians 13:14). First Peter 1:2 says that believers are chosen “according to the foreknowledge of God the Father, by the sanctifying work of the Spirit, to obey Jesus Christ and be sprinkled with His blood.”

God is one, yet He is three.

Read the rest here.

God is One

Today I’m sharing another of John MacArthur’s “God Is” posts from his Grace to You blog. You can read God Is here.

God Is One

by John MacArthur

There is only one true God, and He demands exclusive worship. That is the essence of the first commandment God gave to Moses on Mount Sinai. It is also the unshakable and unchanging truth about God from eternity past to eternity future.

Deuteronomy 6:4–5 points to the oneness and exclusivity of God as the essence of His law: “Hear, O Israel! The Lord is our God, the Lord is one! You shall love the Lord your God with all your heart and with all your soul and with all your might.” The truth that there is one God was fundamental to the Hebrew identity and distinctive of the Israelite nation. The Israelites, living in the midst of dozens of polytheistic cultures, were saying, “There is only one God.” Although they had initially become a nation while living among the Egyptians (whose proliferation of false gods was carried to preposterous extremes) they had held to their faith in Yahweh as the one true God. God had revealed Himself to them as one God, and any Israelite who dared to worship another god was put to death.

Jesus affirmed the importance of God’s singularity. In Mark 12, a scribe asked Him what was the greatest of the commandments and Christ, without hesitation, echoed Deuteronomy 6:4–5, “The foremost is, ‘Hear, O Israel! The Lord our God is one Lord; and you shall love the Lord your God with all your heart, and with all your soul, and with all your mind, and with all your strength’” (Mark 12:29–30). Without denying His own deity, and yet at the same time acknowledging that there is only one God, Jesus taught that the greatest commandment is to give total allegiance with all your heart, soul, mind, and strength to the one true God.

The Father and the Son Are One

In John 10:30, Jesus said, “I and the Father are one.” That is a claim of absolute equality with God; yet at the same time it is a reaffirmation that there is but one God.

Paul emphasized the unity and equality of the Father and the Son in his first epistle to the Corinthians. The Corinthians were living in a typically pagan polytheistic society. Idols were everywhere in the city, and those who worshiped them would bring offerings of food. The priests of the idols’ temples operated food markets, where they sold the uneaten food that had been offered to the idols. Some believers were buying that food, perhaps because they could get it for a much better price than the food at commercial markets.

Christians who had been saved out of pagan worship were troubled over those who were eating food that had been offered to idols. They would go over for dinner and then refuse to eat if they found out the food had come from idol offerings. It was causing serious problems in their fellowship, and Paul wrote 1 Corinthians 8 to resolve the issue. Verse 4 sums up his teaching: “Therefore concerning the eating of things sacrificed to idols, we know that there is no such thing as an idol in the world, and that there is no God but one” (1 Corinthians 8:4) An idol isn’t anything. If food offered to idols is the best bargain in town, get it. Eat it. It isn’t going to make a bit of difference, spiritually. An idol is nothing. And there is no other God but one.

Read the rest here.