Like many other Christians, I used to skim past Genesis 6:4
"There were giants on the earth in those days, and also afterward, when the sons of God came in to the daughters of men and they bore children to them. Those were the mighty men who were of old, men of renown."
But after reading the Book of Enoch and seeing the undeniable evidence of giants, giant-sized buildings, and advanced prediluvian technology, I was forced to reconsider the intermarriage of the angelic beings with humans. Suddenly, I realized that Genesis 6:4 is one of the most FAITH BUILDING verses in the Bible.
Genesis 6:4 establishes, in the opening chapters of today's canon of Scripture, the PRECEPT of EXTRA-PHYSICAL FERTILIZATION. Scientists and Bible scholars are beginning to realize the presence (and possible interaction with) hyper-dimensional beings. This is precisely the interaction depicted in the account of the "sons of God."
Furthermore, the acceptance of, and belief in, extra-physical fertilization is a prerequisite for faith in the VIRGIN BIRTH of Jesus Christ - THE Son of God. But instead of being conceived by inferior angels, Jesus was the Son of the Most High, conceived by the Holy Spirit.
The sons of God are an ANTITYPE of Christ. The Book of Jude, which quotes from the Book of Enoch, states; "And the angels who did not keep their proper domain, but left their own abode, He has reserved in everlasting chains under darkness for the judgment of the great day."
But Jesus left His domain in heaven in obedience to the WILL OF THE FATHER. "For I have given to them the words which You have given Me; and they have received them, and have known surely that I came forth from You; and they have believed that You sent Me." - John 17:8
Likewise, because He was sent by the Father, Jesus returned to His proper abode at the right hand of the Father in heaven. "I came forth from the Father and have come into the world. Again, I leave the world and go to the Father." - John 16:28
"For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. For God did not send His Son into the world to condemn the world, but that the world through Him might be saved." - John 3:16,17