Three in One & One in Three: For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. 1 John 5:7
Got Questions Ministries; The Doctrine of Trinity—Pastor Nelson
Commentaries: (regarding 1 John 5:7): “The Father, repeatedly, by a voice from heaven declared that Jesus was His beloved Son. ¹ ² ³ The Word declared that He and the Father were One, and that whoever had seen Him had seen the Father. And the Holy Ghost, who descended from heaven and rested on Christ at His baptism; who had borne witness to Him by all the prophets; and gave testimony to His resurrection and mediatorial office, by the gift of miraculous powers to the apostles; But whether this passage be cited or not, the doctrine of the Trinity in Unity stands equally firm and certain.”—Matthew Henry.
The Trinity: “I know it is the Word of God that declares the Trinity, that God has said so, I do not inquire how it can be true; I am content with the simple Word of God, let it harmonize with reason as it may. And every Christian should adopt the same course with respect to all the articles of our faith. Let there be no caviling and contention on the score of possibility; be satisfied with the inquiry:
Is it the Word of God?
If a thing be His Word, if He has spoken it, you may confidently rely upon it. He will not lie nor deceive you, though you may not understand the how and the when. When you are asked to explain the Trinity, reply that it is an incomprehensible mystery, beyond the understanding of angels and creatures, the knowledge of which is confined to the revelations of Scripture. It shall be preserved in the future likewise, so that, without a trace of doubt, we may believe in God the Father, God the Son, God the Holy Spirit. This is the faith which we confess with our children daily.
We proclaim these things in order to call attention to the fact that we have not come upon this doctrine in a dream, but by the grace of God through His Word. God help us to be found constant and without blemish in this doctrine and faith to our end. Amen.”—Martin Luther.
When the word ‘LORD’ appears with all letters capitalized, this refers to GOD. ‘Lord’ is a reference to our Lord Jesus Christ–our Redeemer!
LORD = the one and only true GOD; the Creator; our heavenly Father: “Unto thee it was shewed, that thou mightest know that the LORD he is God; there is none else beside him.”–Deuteronomy 4:35
Lord = Jesus Christ, the Son of GOD; ‘our Savior’ ⇒ our Messiah and the only way to the Father. “Jesus Christ is truly God, the Second Person of the Trinity, the Son, the Eternal Word, who with the Father and the Holy Spirit always was, is, and always will be.” † I and my Father are one.–John 10:30
lord = a human ruler