We are supposed to be the mentors of the world. We were separated out by G-d so we will be the light unto the world.
“When the news reached Sarah that Isaac was nearly sacrificed, the shock of his near loss coupled with the relief of his life being spared was too much for her to bear, and she died. Abraham purchased the Machpeilah Cave and the surrounding field from the local Hittites for her burial grounds in Hebron.
[Abraham said to the Hittites,] “Allow me [to buy] a burial ground among you.” Genesis 23:4
The Machpeilah Cave is the burial site of Adam and Eve, the first human beings; as such, it originally belonged to all humanity. In purchasing it, Abraham articulated G‑d’s intention that the mission originally given to humanity as a whole now be passed on to the Jewish people. By accepting this task, the Jewish people were fundamentally separating themselves from the rest of humanity and assuming the role of its mentors. It is our challenge to recognize this destiny today, as well.1 Likutei Sichot, vol. 15, pp. 145–154; vol. 5, pp. 338–344; Sefer HaSichot 5748, vol. 1, pp. 85–89.