From Old Testament times, the Jewish people knew that only God and his Messiah could open the eyes of the blind. However, over their long history, it had never happened. Therefore, when Jesus healed the eyes of a man born blind in John 9:1-41, he caused quite a stir. Some rejected the miracle as spurious, but the healed man held firm to what he knew to be true: "I was blind, and now I see." This is the same testimony of the simplest Christian whose spiritual eyes Jesus has opened to the truth. (sermon notes)
Although many Jews did not believe the gospel and many non-Jews did, everyone who calls on the name of the Lord will be saved.
God has always been with his people, in various ways and temporarily in Old Testament times and later and permanently in human flesh.
The chief priest could not control his wicked sons, so God removed them all and raised up the one who could intercede between humans...