When Yeshua ascended to Heaven in the sight of His chosen apostles on the 40th day of counting the omer (sheaves) from the day of His resurrection from the dead, He had been showing Himself definitely alive with many infallible proofs that could not be denied (just as counting daily the sheaves of the wheat harvest to come provided Israelis proof and assurance that it would surely come), and greatly strengthened the new-born faith of His disciples.
He took His seat at the right hand of God, and is now Sovereign over all things, both in Heaven and on Earth (and in the seas)! When we say, “God is in control”, we are speaking of the Lord Jesus/Yeshua, for all authority has been given Him! With great anticipation and hope we look for “that Day”, when He will return to restore the Kingdom of God back to Israel, and over all the nations, and throughout the Universe! It is my hope and expectation that “that Day” comes in our generation.
We are in need of ‘power from on high’, but God is not going back to Shavuot/Pentecost, but is moving on towards the final Ingathering and harvest of holy, righteous, good fruit. I believe we should expect a major move of the Holy Spirit to bring repentance within the Body of Messiah — similar to the first advent when John the Baptizer, like Elijah, called for God’s people to “repent, for the Kingdom of God is [truly] at hand”. This is how I understand what the baptism of fire is about, which also comes from the Lord as much as does the baptism of the Holy Spirit. It will purge and purify the Bride in holiness, removing all the dross and impurity of all that is not of Christ/Messiah in the believer.