Isaiah 44:21

"Remember these things, O Jacob, and Israel; for thou art my servant: I have formed thee; thou art my servant: O Israel, thou shalt not be forgotten of me. I have blotted out, as a thick cloud, thy transgressions, and, as a cloud, thy sins; return unto me for I have redeemed thee. Sing, O ye heavens, for Jehovah hath done it; shout, ye lower parts of the earth; break forth into singing, ye mountains, O forest, and every tree therein: for Jehovah hath redeemed Jacob, and will glorify himself in Israel."

God did indeed glorify himself in Israel throughout those long ages while the time was being fulfilled for the revelation of the Holy Messiah. There were many defeats for Israel during that period, but none for God. He maintained the continuity of that people through long ages till Christ was born of the Virgin Mary and cradled in the manger at Bethlehem. The Old Israel was intended and expected to recognize and love the Holy Christ, and to receive him with joy and proclaim him as the Saviour of all mankind for the whole world. Israel, through their leaders, refused to do that; but Jesus Christ became the principal Person of all time in spite of Israel's failure. All history is dated from his birth; and history itself shall be concluded in his second advent, at which time he will judge all nations.