There is either one in singular or one in plural. Time has three different forms. Second, minute and hour. Each is different, but the same; because all pertain to time. The Bible never uses the word trinity, but Godhead. And there are 3 in the Godhead. The Father, the Son and the Holy spirit. Meaning, the God of the Bible is one in three. For they are all the same in being, but not in persons. Hence, God the Father, God the Son and God the Holy Spirit. Are all individually distinctive persons who all have the same divine nature. Having one purpose, will and Holiness. The Bible says there are 3 that bear witness in Heaven the Father, the Word, and the Holy Ghost: and these three are one. 1 John 5:7
The word trinity is often confused with the Biblical term Godhead, but trinity is a Catholic concept, which originates from pagan polytheistic worship. The worship of father, mother and child. And is clearly seen in Catholicism. The reason why trinity is conflated with the Godhead is because they both emphasize 3. Thus, instead of saying the Godhead, trinity is ignorantly said. Giving others the wrong impression of what the Godhead means.
Question: What is the word that is one with the Father and the Holy spirit which bears witness? John 1:1 says, “In the beginning was the Word, and the Word was with God, and the Word was God.” So the word was in the beginning with God, and was God. We see three as one at the Baptism of Jesus Christ: due to the Holy spirit descending on Him like a dove, and the Father who dwells in Heaven saying, this is my beloved son in whom I am well pleased. Matthew 3:17
Philip asked Jesus,”show us the Father, and it sufficeth us.” Jesus then answered in response to Philip’s question,” 9 Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Show us the Father? 10 Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works.” John 14:8-10. Therefore, Paul says,” 3 Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high: 4 Being made so much better than the angels, as he hath by inheritance obtained a more excellent name than they.” Hebrews 1:3-4. And Timothy 3:16,”And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.”
The Jews picked up stones wanting to stone Jesus, because he claimed to be God’s Son; and by claiming to be God’s Son was to claim according to them to be equal with Him, seeing it as a blasphemy. But He was God’s Son; and therefore equal with Him because they are the same in being in what they are, but not in who they are. Hence, Christ says, me and the father are one. John 5:18 and John 14:28.
Question: But does not Jesus say the Father is greater than I? Yes in person, because He is the Son of God.
The concept of one in plural is a contrariety what seems to be a contradiction, but is not. It is to do with the relationship between two opposites due to the truth that brings the two together qualifying their meanings simultaneously. So a contrariety is often called a contradiction when people concentrate on the fact that it is just two opposites without seeing the relationship between the two. For there is diversity and at the same time unity, because all three beings are the same in essence, but not in person. Unity is not only present due to the fact that they have the same divine nature, but there is a relationship that has existed throughout eternity within the Godhead itself. There is then a great complexity to fully understand that which surpasses our understanding of 3 being different, but at the same time one, having the same nature. Thus it is possible for God to be 1 in 3.