Per the Nicene Creed:
He ascended into heaven
Per the Holy Bible:
Then Jesus led them to Bethany, and lifting his hands to heaven, he blessed them. While he was blessing them, he left them and was taken up to heaven. So they worshiped him and then returned to Jerusalem filled with great joy. And they spent all of their time in the Temple, praising God.
So when the apostles were with Jesus, they kept asking him, “Lord, has the time come for you to free Israel and restore our kingdom?”
He replied, “The Father alone has the authority to set those dates and times, and they are not for you to know. But you will receive power when the Holy Spirit comes upon you. And you will be my witnesses, telling people about me everywhere — in Jerusalem, throughout Judea, in Samaria, and to the ends of the earth.”
After saying this, he was taken up into a cloud while they were watching, and they could no longer see him. As they strained to see him rising into heaven, two white-robed men suddenly stood among them. “Men of Galilee,” they said, “why are you standing here staring into heaven? Jesus has been taken from you into heaven, but someday he will return from heaven in the same way you saw him go!”
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Truth is...the ascension of Jesus holds no great theological importance other than what Jesus told his disciples about it in John 16:7: "It is best for you that I go away, because if I don’t, the [Holy Spirit] won’t come. If I do go away, then I will send him to you."
Stay tuned. There will be more about the Holy Spirit in five weeks.