In this shiur, delivered in Sharfmans, Rav Burg explains the inner nature of the sin of Nadav and Avihu. What does it mean that they were drunk? Why is Ahron HaKohen told to communicate the issur about being drunk in the Mishkan for all generations? There is a difference between religious and spiritual. Religion is about serving Hashem the way He wants to be served. Spirituality is about serving Hashem with all of our heart. When we combine being religious and spiritual is when we are truly serving Hashem wholeheartedly.