"V'taryag Mitzvot Shamarti"
Question: How can any ONE Jew do all 613 Mitzvot? It's physically impossible! EG How can one be a "Koheim Gadol, and a Levi, etc. etc.
The answer may lie in the Unique Nature of Yaakov Avinu. As Patriarch of all the Tribes, only Yaakov contained the DNA of every future Israelite. As such he had the unique potential to encompass every possible Mitzvah as the progenitor of Am Yisroel