It is written, "For you (the people of Israel) shall be a desirable land, says G-d" (Malachi 3:12). Just as the greatest explorers will never uncover the limits of the great and valuable resources which the Almighty has placed within the earth, neither will anyone ever discover the limits of the great treasures which lie buried within a Jew -- G-d's "desirable land."
Rabbi Israel Baal Shem Tov