He was appointed to be the Son of God with power through the Spirit of holiness [Note: This could refer to the Holy Spirit] when He was raised from the dead.
For He was weak when He was crucified [i.e., by assuming a human body capable of suffering and death], but [now] He lives by God's power. For we too are weak, [along] with Him [i.e., each of us experiences the frailties of a human body], but by [this same] power from God, we will live with Him to serve you. [Note: The various translations differ widely on how to properly translate this difficult verse].
Then Jesus took the twelve apostles with Him, saying to them, "Look, we are going up to Jerusalem and [while there] everything written in [the writings of] the prophets will be fulfilled concerning the Son of man.
Was it not necessary for the Christ [i.e., God's specially chosen one] to suffer these things, and [then] to enter His glorious state [with the Father]?"
So, the Jews asked Him, "What [miraculous] sign will you show us, since you are doing these things [i.e., disrupting their merchandising activities]?"
But God raised Him up, having released Him from the sharp pains [He experienced when dying], because it was not possible that He could be held in death's grip.
So, God raised this Jesus up [from the dead] and we [apostles] are all witnesses [of it].
[Then, at the hands of the Roman authorities] you killed the Prince of [never ending] life, but God raised Him from the dead, and we [apostles] were [reliable] witnesses of it.
we want you men and all the people of Israel to know that this man was made completely well through the name of Jesus Christ from Nazareth. [He is the One] whom you people put to death on the cross, but God raised from the dead.
The God of our forefathers raised up Jesus [from the dead], whom you put to death by hanging Him on a tree [i.e., the cross].
and has now fulfilled to [us], their children, in raising up Jesus [to be the Messiah], just as it was written in the second Psalm [2:7]: "You [i.e., Jesus] are my Son; this day I have become Your Father."
For He has appointed a [certain] day when He will judge the people of the world according to [a standard of] true justice by the man [i.e., Jesus] whom He has appointed [as Judge, See II Tim. 4:8]. [And] He has given assurance to all people [that He will do this] by raising Jesus from the dead."
It was about His Son, Jesus Christ our Lord, who was born as a physical descendant of King David.
and what God's tremendous power [working] in us believers is. [This power is] the same as that utilized by God's mighty strength,
So, Christ also did not take on Himself the honor of becoming head priest, but God said to Him [Psa. 2:7], "You are my Son; today I have conceived you."
how much more will the blood of Christ, who through the eternal Holy Spirit [or, His eternal Spirit] offered Himself without [moral] blemish to God, cleanse our consciences from deeds which lead to [spiritual] death to serve the living God?
They studied [their own prophecies] to learn what, or which, [person or] time the Holy Spirit in them pointed to, in predicting the sufferings of Christ and the glories yet to come.
For prophecy was never produced by the will of man, but people spoke from God, as they were carried along [i.e., inspired] by the Holy Spirit.
and the Living One. I was dead, and see, I am [now] alive forever and ever! And I possess the keys of death and of the unseen place of departed spirits.
Then I fell down in front of him to worship him. But he said to me, "Do not do that; I am [only] a fellow-servant with you and with your brothers who hold onto the testimony about Jesus. You should worship God. For the testimony about Jesus is the spirit [i.e., the purpose, or source] of prophecy."