Via expansions and contractions experienced as push and pull with Jewish study material, a potential convert gains Jewishness although the memories, former essence, remain of the time prior to the ceremonial mikveh bath, where upon becoming new Jew the past is seen with a different lens of Jewish essence. Differently, those that are born Jewish are already born of the Jewish mindset. Thus, those born already Jewish experience a natural push and pull because they experienced cosmic vibrations that cause Jewishness in the womb.
This pattern of expansions and contractions that yield essence is a common theme in Judaism. Another example might be that, via expansions and contractions, we are born from our mother, yet the parental DNA, likeness to our parents, remains as traceable essence. A third example is that via expansions and contractions, tzimtzumim, Gd created the universe forever leaving His Hebrew essence, the Holy language, among all of His creation.tion.
