John 1:10 He was in the world, and the world was made by him, and the world knew him not.
That's because most of the world is deaf and blind, spiritually speaking, of course. Nothing new under the sun.
Romans 11:8 According as it is written (Isaiah 29:10), God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear; unto this day.
Paul is telling us that the reason that the rest of the world is blind to the truth, is because it is written in the Scripture. It is for the elect to take the time to check it out. This word "slumber" in the Greek, would better be translated "stupor". In the Greek, it is "Katanuxis".
God placed the spirit of stupor on all those that are not part of the elect. They are not asleep but they are in a stupor, and they just don't know what is going on, and they will not in this earth age.
Down through all generations, even to this final generation, those eyes will not see, and their ears will not hear and understand the Word of God. Why? Because God told us that this would happen way back in Isaiah 29:10; "For the Lord hath poured out upon you the spirit of deep sleep, and hath closed your eyes: the prophets and your rulers, the seers hath He covered."
God even gave this prophecy to Moses in Deuteronomy 29:4; "Yet the Lord hath not given you an heart to perceive, and eyes to see, and ears to hear, unto this day."
The "heart to perceive", is the mind to understand.
By the hardening of the heart of those that would not believe, God caused that whole generation of Moses day to die in the wilderness and not go into the promised land, because of their disbelief. The only ones to enter into the promised land where the young, and the two that did have faith in God's ability to give Israel the victory.
Those two were Joshua and Caleb.
What God is telling us then in Romans 11:8, is that even when it looks like the whole population has sunk into this stupor, and hardness of heart; God has reserved His elect to Himself, and they will be protected and know the truth in their mind and not be deceived. This applies to every generation, to Moses time, Isaiah's generation, to Paul's age, and also to us in this final generation.
Just as Moses roamed the wilderness for an entire generation of forty years, and when the generation of the stupor died off; then all the youth that had matured, entered that promised land in victory.
There is a generation that will spiritually die off, and fall to the point of this spiritual stupor. Then upon the arrival of the Antichrist [Satan] and his locust army of fallen angels, every last one of them will be deceived and worship the Antichrist (instead of Christ in the Greek) in ignorance, thinking him to be the true Christ.
They will do this in their ignorant stupor, because they willingly listened to their false prophets, religious leaders, and religious seers, as they spouted off their traditions of men. God's elect that He has set aside will not in that stupor, for they will know the Antichrist for who He is.
The elect is prepared because God has opened their minds. God will give His elect a mind that will see what is going on before them, and hear the word and know the truth from deception. Upon the return of Jesus Christ, they will be ready to enter the Millennium age as victors, and not in shame.
Matthew 7:6 Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.
This is referring to Proverbs 9:7; "He that reproveth a scorner getteth to himself shame: And he that rebuketh a wicked man getteth himself a blot."
blot - 3971 m'uwm usually muwm-
blemish, spot, defect
a) used of physical defect
b) used of moral stain
If you go out to some stiffed necked drunk, and try to give your pearls of wisdom to him, he is liable to set you back on your rear and make your nose a blot. When you try to preach to a wicked man, he will mock you for even trying. He doesn't have any sense or knowledge concerning God's Word.
Acts 28:25-27
25 And when they agreed not among themselves, they departed, after that Paul had spoken one word, Well spake the Holy Ghost by Esaias the prophet unto our fathers,
26 Saying, Go unto this people, and say, Hearing ye shall hear, and shall not understand; and seeing ye shall see, and not perceive:
27 For the heart of this people is waxed gross, and their ears are dull of hearing, and their eyes have they closed; lest they should see with their eyes, and hear with their ears, and understand with their heart, and should be converted, and I should heal them.
Allow Jesus to shine on them and the Holy Spirit to water them! 
