Now let's go this way,who were the souls that Christ went to preach to in hell?
I Peter 3:18 "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:"
The purpose for Jesus Christ's coming to earth and living in the flesh, was so that He would die on the cross for your sins. Jesus was just [righteous] in all manner of His flesh life, and in His death "the Just" suffered for the sins of the unjust. Jesus Christ came to earth to die so that you do not need to go to hell, but by your faith in Him and belief in what Jesus has done on the cross, through your repentance to the Father in Jesus name you can be saved. It is your soul that receives eternal life, and when this flesh body dies and is laid in the ground, it is your spirit and soul that is quickened, or goes on living eternally. That is the work of the Holy Spirit, giving you new changed life, where there was only a dead soul before. Jesus died to bring all souls to the Father.
If you ever had any question as to what part of Jesus died on the cross, you have it right here. Jesus Christ's flesh body was died, whereas His spiritual body was quickened or made alive by His Spirit. Jesus was spiritually alive when He descended into the prison to preach to those lost souls.
I Peter 3:19 "By which also He went and preached unto the spirits in prison,"
These spirits that Christ preached to in prison, where the spirits of the saints that died prior to His death on the cross.
I Peter 3:20 "Which sometime were disobedient, when once the longsuffering for God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water."
Not the word "sometime", they were not disobedient all the time like the fallen angels, but were disobedient while living in the flesh body. Do you think that it was the whether that saved those adamic souls? They were saved from the water, and the reason that God saved them is given in Genesis 6:9; "THESE ARE THE GENERATIONS OF NOAH: Noah was a just man and perfect in his generations, and Noah walked with God."
The key to understanding this verse is in the word "perfect", for in the Hebrew text, it is the word "tamin", which means "without blemish as to breed or pedigree." In Genesis 6:1-7, when men started to multiply on the face of the earth, daughters were born to them. When the sons of God beheld the daughters of men, they desired them. Many "sons of God" or fallen angels left their place of habitation in the heavens and came to earth and multiplied with those daughters of flesh man, and from them came the Nethinim. This is what the book of Jude is all about.
Also, did He not talk to Moses and Elijah on the mount?