Our desire - the will, efforts, and yearning to seek Hashem - is a prime vessel for the Divine illumination of emuna just as a crystal goblet is for a fine wine. We wouldn't want to pour a thirty year-old Chateau de Rothschild Cabernet wine in a broken or dirty glass, for the wine would either spill on the floor or become ruined. A fine wine necessitates a whole and immaculately clean goblet. By the same token, without proper vessels, a person can't receive Divine illumination. Hashem doesn't want to spill His "fine wine" on the floor – we must be able to contain it.