God said to Abram; “. . . And I will make of thee a great nation, and I will bless thee, and make thy name great; and thou shalt be a blessing: And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed.” This was at the time of Abraham’s departure from Ur of the Chaldees. (Gen.12:2-3) The essence of this promise was repeated to Isaac and Jacob. (Gen.26:4 / 28:14) The heart of these promises is the hope of blessing for all nations.
The blessing is “. . . turning away every one of you from his iniquities.” (Acts 3:26) This is better than health, wealth, power, or a long life. The Messiah came to redeem man from sin which began with Adam so long ago. . . man driven from the tree of life.
God preserved this truth through Israel. He founded this redemption through that ancient nation.