This post is regarding Question 3 of the New City Catechism.
Question: How Many Persons Are There in God?
Answer: There are three persons in the one true and living God: the Father, the Son, and the Holy Spirit. They are the same in substance, equal in power and glory.
Importance of The Doctrines of the Trinity
The doctrine of the Trinity has been one of the most foundational, essential beliefs of the Christian church throughout our history. This doctrine was taught by the apostles and by God himself through his word. And specific beliefs regarding the Trinity were clarified by councils and creeds of the early church.
Nature, Persons, Substance, and Essence
One necessary distinction that is made is that between persons and being. God is three persons: The Father, the Son, and the Holy Spirit. But, he is one being, meaning that he has one nature, substance, and essence.
We do not have three individual gods; Christianity is a monotheistic religion. As stated by the Shema from Deuteronomy 6, “The Lord our God, the Lord is one.” Nevertheless, our unified God exists in three distinct persons.
Following is an explanation of the divinity of each of the three persons of the Trinity.