To think of becoming a fool is the real qualification for a bonafide disciple. As soon as one thinks that he has become the wiser man than the spiritual master one is surely doomed. We should remain everlastingly a fool before the spiritual master. Not artificially, but feelingly, and then we can make real progress. Even my spiritual master, a great scholar, remained a so-called fool before his spiritual master, who was outwardly an illiterate village fellow. So in the Absolute world the fool is also the master, and the master is also a fool in reciprocal dealings. Lord Chaitanya also accepted Himself a great fool before His spiritual master, and all of us must follow the transcendental process.
Srila Prabhupada; letter to Rayarama dasa, dated December 14th, 1967