In the same way that every Jewish person belongs to God, they are his people/servants, so every non-Jewish person belongs to Satan, they are his people/servants. Because we were created with a free will, God gives non-Jewish people the option to switch sides if they want to. We do not have to remain under Satan’s control if we don’t want to.
Salvation is the process whereby Satan’s hold on a person is released, We escape from him. God literally snatches believers out of Satan’s hand (Isaiah 50:2). Even though the Israelites belonged to God, Satan was still able to influence them into disobeying God because of their free will. Therefore, everyone needs salvation.
Isaiah stated, “Behold, the LORD’s hand is not shortened, that it cannot save; neither his ear heavy, that it cannot hear; but your iniquities have separated between you and your God, and your sins have hid his face from you that he will not hear” (Isaiah 59:1-2). The Hebrew word translated separated, badal means to divide (914) in the sense of cutting or splitting something in two (2673).
To separate something can mean that it is consecrated or set apart for a specific purpose (5144). In this sense, Israel had deliberately separated itself from God in order to worship foreign gods or idols (Hosea 9:10). In essence, they chose to join Satan’s camp and were enemies of God. That’s why the northern kingdom of Israel was destroyed and its people removed from the Promised Land.
In order for God’s people and the rest of humanity to become unseparated from God, there needed to be an intercessor, someone that could encroach upon Satan’s territory and set his prisoners free (Isaiah 59:16). Basically, from a military stand point, the Messiah’s mission was to advance over Satan’s territory (area of influence) and make an impression on his people so that they would choose to abandon ship and return to God.
The reason why Satan’s people are referred to as prisoners (Isaiah 42:7; 49:9) is because they cannot set themselves free. The power of sin can only be broken by God. The separation that occurs when a person sins is permanent unless God forgives the sin and restores the relationship. Isaiah declared, “Therefore his arm brought salvation unto him; and his righteousness sustained him” (Isaiah 59:16).
Israel’s Messiah was expected to be a warrior, but the people were mistaken about the type of warfare he would engage in. Isaiah described the Messiah in spiritual terms. He said, “For he put on righteousness as a breastplate, and a helmet of salvation upon his head; and he put on the garments of vengeance for clothing, and was clad with zeal as a cloke” (Isaiah 59:17).
The apostle Paul described similar attire for Christians in Ephesians 6:14-17 where he talked about putting on the whole armour of God in order to defeat the devil. Paul explained, “For we wrestle not against flesh and blood, but against principalities, and powers, against the rulers of the darkness of this world, against spiritual wickedness in high places” (Ephesians 6:12).
Somehow, when Jesus came, Israel didn’t recognize its Messiah, even Paul rejected Christ initially. Isaiah talked about “an acceptable time” and “in a day of salvation” when Israel would be redeemed (Isaiah 49:8). Isaiah concluded with, “And all flesh shall know that I the LORD am thy Savior, and thy redeemer, the mighty One of Jacob” (Isaiah 49:26).
Because God intended that his Messiah would save the world, not just his chosen people, his plan of salvation included a period of time when the Gentiles’ sin would be dealt with. Prior to the dawn of Zion’s glory, there would be a period of grace in which salvation would be offered to everyone. Afterwards, God’s people would be redeemed. Isaiah declared:
Arise, shine; for thy light is come, and the glory of the LORD is risen upon thee. For behold, the darkness shall cover the earth, and gross darkness the people: but the LORD shall arise upon thee. And the Gentiles shall come to thy light, and kings to the brightness of thy rising. (Isaiah 60:1-3)