How can God be three Persons and one God at the same time? What is the Trinity?
Here's the answer:
God is 3 in 1.
God is three Persons: the Father, the Son, and the Holy Spirit. But He isn't three gods. When we say God is three Persons, we don't mean that He is three people or three men. By "person," we mean a real being—someone who can think, feel, and choose. Each Person of God is fully God. The Father is fully God. The Son is fully God. The Holy Spirit is fully God.
When we pray, the three Persons of God all work together. We pray to the Father, and He answers. The Son helps us when we pray. The Spirit lives in us and gives us strength to pray. Each Person of God does different things, but they are one God. The Father, Son, and Holy Spirit are united. They are perfect in every way. They share everything: the same love, the same holiness, and the same power. “Trinity” is the word we use for the three different Persons of our one God.
God is not like us. Each of us is only one person. But God is three Persons in one. It is hard to understand how God can be a Trinity, but it is true. The Bible teaches us about the Father, the Son, and the Holy Spirit—One God. There are many things about God that we can’t fully understand. The Trinity is one of those things. God is greater than our thoughts. He is greater than our imagination. He is greater than everything.
"The Lord is our God. The Lord is one" (Mark 12:29b).
"May the grace of the Lord Jesus Christ, the love of God, and the fellowship of the Holy Spirit be with you all" (2 Corinthians 13:14).
"So you must go and make disciples of all nations. Baptize them in the name of the Father and of the Son and of the Holy Spirit" (Matthew 28:19).