There is a place in scripture where we find God the Father, God the Son and God the Holy Spirit together in heaven.
The apostle John describes the Throne of God in Revelation 4:2-11. In chapter 4, we see God the Father seated on the Throne in verses two and three:
"At once I was in the Spirit, and there before me was a throne in heaven with someone sitting on it. And the one who sat there had the appearance of jasper and ruby. A rainbow that shone like an emerald encircled the throne" (NIV).
Like Stephen, John is describing God seated on his throne, in his glory. John describes the Holy Spirit as seven lamps of fire - which is an image of the menorah - representing the seven spirits of God - which are the seven attributes of the Holy Spirit:
"From the throne came flashes of lightning, rumblings and peals of thunder. In front of the throne, seven lamps were blazing. These are the seven spirits of God" (NIV).
In Revelation 5:1, we see God the Father holding a book: "Then I saw in the right hand of him who sat on the throne a scroll with writing on both sides and sealed with seven seals" (NIV).
Only Jesus is worthy to open the book with the seven seals, and we see him in Revelation 5:5-9:
"Then one of the elders said to me, 'Do not weep! See, the Lion of the tribe of Judah, the Root of David, has triumphed. He is able to open the scroll and its seven seals.'
Then I saw a Lamb, looking as if it had been slain, standing at the center of the throne, encircled by the four living creatures and the elders. The Lamb had seven horns and seven eyes, which are the seven spirits of God sent out into all the earth. He went and took the scroll from the right hand of him who sat on the throne. And when he had taken it, the four living creatures and the twenty-four elders fell down before the Lamb. Each one had a harp and they were holding golden bowls full of incense, which are the prayers of God’s people. And they sang a new song, saying:
'You are worthy to take the scroll
and to open its seals,
because you were slain,
and with your blood you purchased for God
persons from every tribe and language and people and nation'" (NIV).
We can see, from the first verses of Genesis through the book of Revelation, that God the Father, God the Son and God the Holy Spirit, are One God - Three in One - and that they work together, each operating from a different position and function within the Trinity, to fulfill a single purpose.
Jesus is God; He is God the Son. He is fully Man, resurrected and ascended; and he is fully God, eternal and full of power.
As Paul wrote to Jewish believers in the book of Hebrews 1:1-4:
"In the past God spoke to our ancestors through the prophets at many times and in various ways, but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe. The Son is the radiance of God’s glory and the exact representation of his being, sustaining all things by his powerful word. After he had provided purification for sins, he sat down at the right hand of the Majesty in heaven. So he became as much superior to the angels as the name he has inherited is superior to theirs" (NIV).
May God bless you and keep you, in Jesus' holy name.