Teachers and students – those two personalities, created by the Creator in this world for the reason that it’s impossible for the student to comprehend the unknown and incomprehensible, except for when he is being tuned to that by the teacher.
Let’s compare this, for instance, to the piano, which has to be tuned in a totally different manner, but which manner is unknown: there are hundreds of strings and each one of them, and all of them together must be tuned in the unknown manner. And only if very precise tuning will be done, then the spiritual will recall – and the strings will begin playing by themselves. But a person on his own can’t find the order for tuning the strings. For this purpose in this world there are such correlations between people as Teacher-student, and the Teacher, gradually, using clues, arouses the correct direction of will in the student, brings him, as a child, without obviously directing to the seemingly independent conclusions of the student on how to correctly tune his instrument.
Courtesy of http://www.youtube.com/watch?v=ZOMD8WRkZYk