Is the TRINITY in the Bible?
Tertullian, a Latin theologian who wrote in the early 3rd century, is credited as being the first to use the Latin words “Trinity”, “person” and “substance” to explain that the Father, Son, and Holy Spirit are “tres personae, una substantia”.
It was a word used to easily describe the CONCEPT of ONE GOD in three persons.
Does the Bible teach it? Yes it does.
Here are some easy references for you to share when asked about God in three persons: Father, Son and Holy Spirit.
1. Father, Son and Holy Spirit are one in 1 John 5:7-8
“7 For there are three that bear witness in heaven: the Father, the Word, and the Holy Spirit; and these three are one. 8 And there are three that bear witness on earth: the Spirit, the water, and the blood; and these three agree as one.” (NKJV)
2. The Father and Holy Spirit was present during Jesus’ baptism in Matthew 3:16-17
16 As soon as Jesus was baptized, he went up out of the water. At that moment heaven was opened, and he saw the Spirit of God descending like a dove and alighting on him. 17 And a voice from heaven said, “This is my Son, whom I love; with him I am well pleased.” (NIV)
3. We are commanded to baptize in the name of the Father, Son and Holy Spirit in Matthew 28:19
“Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,” (NKJV)
4. ST. Paul invoked the Trinity in his benediction to the Corinthians as we can read in 2 Corinthians 13:14
“May the grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with you all.” (NIV)
The Catholic doctrine of ONE GOD IN THREE PERSONS is sound Bible teaching.