People in this world are all ordinary people. But to one Persian named Abram (and later Abraham), the Creator revealed Himself , and it is that revelation that made him special. He became a “Yehudi” (Jewish), from the word “Yechudi” (single-unique), that is he and the Creator became one. Who then is this Abraham? He is a man who was endowed with a spiritual spark, a sensation of the Creator. But other than that he was an ordinary person.
There is no difference between a Jew and a Gentile, other than that spark of the Creator found in the Jew. That means that if that spark exists in a person’s heart , that person is named Jewish. If it vanishes, the Jew again becomes a Gentile. The latter, however, is an impossible situation, because sanctity always increases and never decreases. It is a spiritual law, by which everything is brought closer to the Creator.
Courtesy of http://www.youtube.com/watch?v=JgQqnzdVqJk