Answer: *Warning* long answer but worth the journey. All scripture is included.
Following His crucifixion, and prior to His resurrection, Christ Jesus descended to a place in the heart of the earth known as Hades in the New Testament, or Sheol in the Old Testament.
At that time, there were two areas in Hades. One area was known as Abraham’s Bosom (Paradise), and the other area was the area of the unsaved. (Luke 16: 19-26)
It was to Abraham’s Bosom (Paradise) that Christ Jesus descended to proclaim victory over sin and death on the cross of Calvary as the perfect Lamb of God who takes away the sin of the world.
Abraham’s Bosom (Paradise) was where Old Testament saints who had died (people of faith in the one true and eternal God Jehovah) were held captive awaiting atonement of their sin debt.
When Christ Jesus ascended to heaven forty days after His resurrection, He took these Old Testament saints to heaven with Him. (Ephesians 4:8) Paradise is now in heaven. (2 Corinthians 12:2-4)
Jesus did not go into the area of the unrighteous dead when He descended to Hades, only into the area of the righteous dead (Abraham’s Bosom: Paradise.)
BELOW IS A SCRIPTURAL STUDY OF THE ABOVE EXPLAINATION
JESUS REVEALING HADES OR SHEOL AND ABRAHAM’S BOSOM
[19] “There was a rich man who was clothed in purple and fine linen and who feasted sumptuously every day. [20] And at his gate was laid a poor man named Lazarus, covered with sores, [21] who desired to be fed with what fell from the rich man’s table. Moreover, even the dogs came and licked his sores. [22] The poor man died and was carried by the angels to Abraham’s side. The rich man also died and was buried, [23] and in Hades, being in torment, he lifted up his eyes and saw Abraham far off and Lazarus at his side. [24] And he called out, ‘Father Abraham, have mercy on me, and send Lazarus to dip the end of his finger in water and cool my tongue, for I am in anguish in this flame.’ [25] But Abraham said, ‘Child, remember that you in your lifetime received your good things, and Lazarus in like manner bad things; but now he is comforted here, and you are in anguish. [26] And besides all this, between us and you a great chasm has been fixed, in order that those who would pass from here to you may not be able, and none may cross from there to us.’ [27] And he said, ‘Then I beg you, father, to send him to my father’s house– [28] for I have five brothers –so that he may warn them, lest they also come into this place of torment.’ [29] But Abraham said, ‘They have Moses and the Prophets; let them hear them.’ [30] And he said, ‘No, father Abraham, but if someone goes to them from the dead, they will repent.’ [31] He said to him, ‘If they do not hear Moses and the Prophets, neither will they be convinced if someone should rise from the dead.’” – [Luke 16:19-31 ESV]
*the word Abraham’s side also translated Abraham’s bosom
*the word Hades is used here for the Hebrew word Sheol
WHERE WE GET THE IDEA THAT SHEOL IS IN THE HEART OF THE EARTH
For a fire is kindled by my anger, and it burns to the depths of Sheol, devours the earth and its increase, and sets on fire the foundations of the mountains. -
[Deu 32:22 ESV]
So they and all that belonged to them went down alive into Sheol, and the earth closed over them, and they perished from the midst of the assembly. -
[Num 16:33 ESV]
Will it go down to the bars of Sheol? Shall we descend together into the dust?” – [Job 17:16 ESV]
O LORD, you have brought up my soul from Sheol; you restored me to life from among those who go down to the pit. – [Psalm 30:3 ESV]
“If they dig into Sheol, from there shall my hand take them; if they climb up to heaven, from there I will bring them down. – [Amos 9:2 ESV]
*these above verses are 5 of the 63 verses with the reference to Sheol… all of them associate Sheol with words like down, the pit, under the earth, low, dark, grave, burry, dig etc. Hence we draw the conclusion that Sheol is somehow in the Earth. I especially like the first reference which can infer that the molten iron core at the center of the earth “that sets the foundations of the mountains on fire” ie magma or lava might be the source of the fire in Sheol fueled by God’s wrath. Of course this is pure conjecture on my behalf, but I do like the imagery from the scripture in Deuteronomy links foundations of the mountains + fire + depths of the earth. Sounds a lot like a piping hot molten core to me ;D
http://www.blueletterbible.org/search/translationResults.cfm?Criteria=sheol&t=ESV&sf=5 Here is a link for you to see the 63 verses on Blue Letter Bible.
JESUS DESCENDED INTO THE LOWER PARTS OF THE EARTH
[7] But grace was given to each one of us according to the measure of Christ’s gift. [8] Therefore it says, “When he ascended on high he led a host of captives, and he gave gifts to men.” [9] ( In saying, “He ascended,” what does it mean but that he had also descended into the lower regions, the earth? [10] He who descended is the one who also ascended far above all the heavens, that he might fill all things.) – [Ephesians 4:7-10 ESV]
*Paul is quoting Psalm 68:18
PARADISE IS IN HEAVEN NOW AND SAINTS GO TO BE WITH JESUS NOW
I know a man in Christ who fourteen years ago was caught up to the third heaven–whether in the body or out of the body I do not know, God knows. [3] And I know that this man was caught up into paradise–whether in the body or out of the body I do not know, God knows– [4] and he heard things that cannot be told, which man may not utter. – [2 Corinthians 12:2-4 ESV]
For we know that if our earthly house, this tent, is destroyed, we have a building from God, a house not made with hands, eternal in the heavens. [2] For in this we groan, earnestly desiring to be clothed with our habitation which is from heaven, [3] if indeed, having been clothed, we shall not be found naked. [4] For we who are in this tent groan, being burdened, not because we want to be unclothed, but further clothed, that mortality may be swallowed up by life. [5] Now He who has prepared us for this very thing is God, who also has given us the Spirit as a guarantee. [6] So we are always confident, knowing that while we are at home in the body we are absent from the Lord. [7] For we walk by faith, not by sight. [8] We are confident, yes, well pleased rather to be absent from the body and to be present with the Lord. – [2Corinthians 5:1-8 NKJV]
*the words Paul uses “the third-heaven” is the phrase used to denote height. The idea here is that paradise is no longer in the depths of the earth with Sheol, but now in heaven with Jesus. In the second reference Paul goes on to explain that while in our earthly bodies we are not in Christ’s full presence because our earthly bodies are corrupted and cannot go to heaven with us… but when this earthly body dies we will be present with the Lord having been translated into the glorious new bodies. I will be buff! Our mortality will be swallowed up by LIFE!!