The only question which confuses many people is that “we have three Gods or one God in all?” as we see the Bible, Father Son, and Holy Spirit are one, they came at different times and in different style but their purpose was the same that all humans live in Holiness and away from the sin. They all guide humans in every work. Jehovah in the Old Testament and Jesus in the New Testament and the Holy spirit which tells now is working today for every person who believes in God.

When Jesus was on earth then who was in heaven?

If we say the father son and Holy Spirit are one, then again a question comes if they are one then, “when Jesus was on earth then who was in heaven?” Then we get confused but the answer is simply that he is omnipresence means everywhere present because he is God himself. The father, son and Holy Spirit are one being, just as man is made up of body, soul, and spirit. It’s also written in (Matthew 28:19) baptize them in the name of the father and the son and the Holy Spirit. This verse does prove that they are one because if they were different then there would have been written that baptize in the names but not in the name. And God commands people of Israel the Lord is your God. The Lord is one (Deuteronomy 6:4).

In (John 10:38) it is written that ‘’but if I do what my father does, you should believe in what I do. You will not believe in me but you should believe in the works I am going to do. Then you will know and understand that the father is to me and I am in the father.’’ and in (John 14:11) here Jesus says believe on me when I say that the Father is in me and I am in the Father. Or believe in the miracles I have done.

How in Old Testaments father son and Holy Spirit are one?

In the old testament, there are so many verses that God is one like if we read (Exodus 20:3) ‘’you must not worship any other God except me.’’ Here God commands Israeli’s not to worship any other god. Then in (Isaiah 45:18) says that The Lord is God. He made the skies and the earth. He put the earth in its place. He did not want the earth to be empty when he made it. He created it to be living on. I am the Lord. There is no other God.

And in (James 2:19) James says you believe there is one God. That is very good, but also the demons believed that too and they were shaking with fear. In (Jude 1:25) Jude also says ‘’He is only the one and only God who delivers us. To all the glory, authority, greatness, and power through our Lord Jesus Christ of the Nazarat for all the time now, past and forever. Amen’’ and in (Revelation 1:8) it is written The Lord God says,’’ I am the Alpha and the Omega. I am the one who is, who always was, and who is coming. I am All-powerful.’’

But it does prove that Jesus himself was God. In (Isaiah 2:9) A baby is born to us, a son is given to us: And the government will be on his shoulder: And his name will be called amazing, Mighty God, Counselor, Prince of Peace and the Eternal Father. And in (1 Timothy 3:16) says ‘’And there is no doubt, the deep secret of great Godliness is: God appeared and manifested in the flesh, who is righteous in the Spirit, and Angels saw him, evangelized unto gentiles, and the world believed in him and was elevated in his glory. Bible also proves he is from heaven (1 Corinthians 15:47) and he was made a quickening spirit (1 Corinthians 15:45). And for in him dwelled all the fullness of the Godhead bodily (Colossians 2:9).

Well, the father son and holy spirit are one because the Bible does prove this.

"The Trinity of God"
God the Father - God the Son - God the Holy Spirit

Trinity of God is a scriptural concept used to express the collective unity and character of God: God the Father, God the Son, and God the Holy Spirit. It is considered to be a divine mystery beyond human comprehension.

Some believe that "Jesus Christ" is the only entity of God; that He is God Father, the Savior, and the Holy Spirit, all in one being.

Others believe there are three entities in one collective unity: "God the Father," "God the Son," and " God the Holy Spirit."

Either way, the various views do not affect God's Plan of Salvation.

Before understanding the Trinity, it is first essential to understand the Oneness of God:

The three members of the Godhead (forming a Trinity) are easily identified in the following Scripture:

"And straightway coming up out of the water, he saw the Heavens opened, and the Spirit like a dove descending upon him. And there came a voice from Heaven, saying Thou art my beloved, Son in whom I am well pleased," (Mark 1:10-11).

The above Scripture identifies the "Father," the "Son," and the "Holy Spirit as individual entities."

"Jesus, God the Son" (who had been baptized)

"The Holy Spirit" (descending upon the Son)

"The Father" (speaking from Heaven)

In the following Scripture, Stephen saw "God the Father," and "Jesus," together in Heaven:

"But He, being full of the Holy Ghost, looked up steadfastly into Heaven, and saw the Glory of God and Jesus standing on the right hand of God" (Acts 7:55).

Stephen saw "God the Father" and "Jesus" at the same time, in Heaven. The Scripture tells us the "Holy Spirit" was in Stephen, again revealing a Trinity.

In the Bible

The reference to God is usually to "God the Father."

The Reference to either The Word or Jesus is to "God the Son."

The reference to the Holy Spirit is to "God the Holy Spirit."

The Oneness of God

Most Bible Scholars believe the Hebrew word Echad, means, a "unified oneness." God uses the "Echad" terminology in the very first chapter of the Bible to reveal a plurality in the Godhead: "Let us make man in our image, after our likeness" (Genesis 1:26).

Perhaps a good illustration of the unified Oneness of God would be an egg containing a yolk, egg white, and shell. Jesus was referring to this type of Oneness when He prayed: "That they all may be one as thou Father, art in me, and I in thee, that they may be one in us" (John 17:21).

Although the term Trinity is not seen in Scripture, the structure is found throughout the New Testament.

The Father

In the Trinity view, the Father is considered to be the first person of the Godhead, the giver of all things. James 1:17 says, "Every good gift and every perfect gift is from above, and cometh down from the Father of Lights."

It is the Father's will we are carrying out when we are obedient to God, and we do so under the administration of Christ, and by the power of the Holy Spirit. Jesus said, "For I came down from heaven, not to do my own will, but the will of him that sent me" (John 6:38).

We are the Father's children. When we have a need we go to the Father: "If ye then, being evil, know how to give good gifts unto your children; how much more shall your Father which is in heaven give good things to them that ask him" (Matt 7:11?)

Jesus Christ

Jesus Christ is the second person of the Godhead. Many Scriptures are confirming that Jesus is God, "God the Son."

In Matthew Jesus is called Emmanuel, meaning "God with us" (Matt 1:23).

"Who being in the form of God, thought it not robbery to be equal with God" (Phil 2:6,).

He is God come to earth. "Before Abraham was, I AM" (John 8:58).

Jesus is the express image of the Father: "... He that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?" (John 14:9)

It is through Jesus that we gain access to the Father:

"Jesus saith unto him, I am the way, the truth, and the life; no man cometh unto the Father, but by me" (John 14:6).

The names of those who have received Him are written in His book in Heaven.

"And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world" (Rev 13:8)

Holy Spirit

In Scripture, the Holy Spirit is described as the "Comforter."

(John 14:16). The Greek word for Comforter is Parakletos, which means our teacher, our guide and our helper. He comes to us in a Spiritual form, to comfort during sorrowful times, trials and tribulations.

The Holy Spirit is there beside us and in us at all times. "And I will pray the Father, and he shall give you another comforter, that he may abide with you for ever" (John 14;16).

We can talk to the Holy Spirit and seek His guidance, asking for an inward witness concerning different matters. "For the Holy Ghost shall teach you in the same hour what ye ought to say," (Luke 12:12,).

Nine Gifts of the Holy Spirit:

"The word of wisdom; Word of knowledge; Discerning of Spirits; Prophecy; Divers kinds of tongues; Interpretation of tongues; Faith; Gifts of healing; Working of miracles;" (1 Cor 12:7-10).

The Nine fruits of the Holy Spirit:

"But the fruit of the Spirit is, Love; Joy; Peace; Forbearance, Kindness, Goodness, Faithfulness,

Gentleness and Self-control," (Gal 5:22-23).