The primary way to advance to new levels of understanding is to study Torah and pray with all of your strength. Then, you attach yourself to Hashem, may He be blessed, that dwells within the letters of Torah and prayer. This infusion of Divine light subdues any physical inclination, and you can experience the abnegation or divestiture of your physical being. Then, you will enter the Supernal worlds and constantly rise to new levels of understanding and clarity.
Toldos Aharon, Shelach
Heart of Prayer: Baal Shem Tov, by Tvi Meir Cohn