Where, at Ephesians 4:8-10, does it say anything about Jesus being spiritually alive (while his body was dead), and where does it say he freed captives while he was supposed to be dead?
So here is the back up verses for Ephesians 4:8-10 from 1 Peter:
1 Peter 3:18-20 KJV
For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit: [19]
By which also he went and preached unto the spirits in prison; [20] Which sometime were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water.
Luke 16:20-24 KJV
And there was a certain beggar named Lazarus, which was laid at his gate, full of sores, [21] And desiring to be fed with the crumbs which fell from the rich man's table: moreover the dogs came and licked his sores. [22] And it came to pass, that the beggar died, and was carried by the angels into Abraham's bosom: the rich man also died, and was buried; [23] And in hell he lift up his eyes, being in torments, and seeth Abraham afar off, and Lazarus in his bosom. [24] And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame.
This is the abode of the dead.. where the beggar was seperate from Lazarus for ever.. the beggar set for hell .. Lazarus for Paradise.
Jesus said to the thief on the cross that He would be with the thief in Paradise.
In back up of Ephesians we also have this in Psalms:
Psalm 68:18 KJV - 18 Thou hast ascended on high, thou hast led captivity captive: thou hast received gifts for men; yea, for the rebellious also, that the LORD God might dwell among them.
So it is clear that before resurrection, Jesus was still active. Out of His fleshly body.
What exactly He did isnt 100 percent clear but I support that He descended to the lower parts of the earth and preached to captive spirits and set them free from the abode of the dead.. ie the types of Lazarus. This did not include the types of the beggar..who forever remain separated from God.