Believe in JESUS because God sent his Son to this earth for the glory of his people Israel and a light for the Gentiles (Luke 2:32).
“Who is he that overcometh the world, but he that believeth that Jesus is the Son of God? This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth” (1 John 5:5–6).
“For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counseller, the mighty God, the everlasting Father, the Prince of Peace. Of the increase of his government and peace there shall be no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even forever” (Isaiah 9:6–7).