The knowledge that the disciple seeks is of quite another sort. In Arabic this knowledge is called Ilmal - Batim, the knowledge not of the world, the knowledge that has nothing to do with this world. When the desire comes for another knowledge -- to know what it is that has given the fishes the ability to swim in the water, which they have not been taught; what it is that has given the birds the ability to fly -- then they seek for a guide, someone who can show them the way to this other knowledge. And they find a teacher, for where there is a need, it is supplied.