Ascension Explanation
Jesus Christ is not the Image of word alone, but the Image of invisible trinity God, that means in Jesus Christ we can see our Heavenly Father (I and the Father are one - John 10:30), and the Son (He who came down from heaven, that is, the Son of Man who is in heaven - John 3:13), and the Holy Spirit (if I do not go away, the Helper will not come to you - John 16:7).
Even after the resurrection, Jesus Christ reveled that he is our Heavenly Father, Son, and Holy Spirit - In the first book, O Theophilus, I have dealt with all that Jesus began to do and teach, until the day when he was taken up, after he had given commands through the Holy Spirit (As a Holy Spirit) to the apostles whom he had chosen. He presented himself alive (As a Son) to them after his suffering by many proofs, appearing to them during forty days and speaking about the kingdom of God. And while staying with them he ordered them not to depart from Jerusalem, but to wait for the promise of the Father, which, he said, you heard from me (As a Father); for John baptized with water, but you will be baptized with the Holy Spirit not many days from now - Acts 1:1-5
And then Christ explained his individuality, and the Father and Son relationship with the Trinity God - So when they had come together, they asked him, Lord, will you at this time restore the kingdom to Israel? He said to them, It is not for you to know times or seasons that the Father has fixed by his own authority. But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth. And when he had said these things, as they were looking on, he was lifted up, and a cloud took him out of their sight - Acts 1:6-9