There was a spiritual deception over the Gentiles before the cross that has now been lifted. The darkness has been confronted and exposed and overcome through the Light of the truth. That light is centred in the person and message of Christ. Satan is no longer able to deceive the Gentiles in this New Testament age in the same manner and scope as he deceived them prior to Jesus binding Satan at the cross.
Scripture repeatedly identifies the Messianic intra-Advent period as the time of the enlightenment of the Gentiles. This does not in any way insinuate that all will be saved. Not in any way. With the global expanse of the great commission the Gentiles are now without excuse. The ignorance is gone. The veil is lifted.
When Scripture speak about the enlightenment of the Gentiles and the removal of the deception it doesn’t mean that every Gentile will be saved, but that the Gospel message and opportunity would be extended to them as a whole – just like Israel experienced it in the Old Testament.
Zacharias the father of John the Baptist was filled with the Holy Ghost in Luke 1:67-80 and prophesied: “Blessed be the Lord God of Israel; for he hath visited and redeemed his people, And hath raised up an horn of salvation for us in the house of his servant David; As he spake by the mouth of his holy prophets, which have been since the world began: That we should be saved from our enemies, and from the hand of all that hate us; To perform the mercy promised to our fathers, and to remember his holy covenant; The oath which he sware to our father Abraham, That he would grant unto us, that we being delivered out of the hand of our enemies might serve him without fear, In holiness and righteousness before him, all the days of our life … Through the tender mercy of our God; whereby the dayspring from on high hath visited us, To give light to them that sit in darkness and in the shadow of death, to guide our feet into the way of peace. And the child grew, and waxed strong in spirit, and was in the deserts till the day of his shewing unto Israel.”
Jesus came to shine a light of truth into the world. The reality is: He was truth because He was God. He epitomized all that was truth. In John 14:7 He said, “I am the way, the truth, and the life: no man cometh unto the Father, but by me.” In Revelation 22:6 He is described as: “faithful and true.”
Jesus said in John 8:12 “I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life."
John 12:46 "I am come a light into the world, that whosoever believeth on me should not abide in darkness.”
He shined the light and it dispelled the darkness. In fact, wherever this light shines it removes ignorance and deception and enlightens and sets men free. No one could surely deny that this light has been shining strong upon the Gentiles for 2,000 year. The evidence is there for all to see.
Through the indwelling Holy Spirit (who reveals Christ in us), and the preaching of the Word of God, The Church now manifest that light throughout the nations. God has availed the Gentiles an opportunity to embrace the light. They are no longer without excuse. It is not therefore a question of whether the light came, or that it exists, but will the Gentiles receive it and believe it.
Ephesians 5:8: “For ye were sometimes darkness, but now are ye light in the Lord: walk as children of light.”