There are two ways of looking at things: one looking from the cause to the effect; the other from the effect to the cause. The first is like looking from the top of the mountain to the foot; the other is like looking from the foot of the mountain to the top. The one who looks from the foot often fails to see what is going on at the top. Therefore the mystic follows the other way. He perceives that a person who investigates a higher truth by standing at the foot of the mountain may sometimes succeed in seeing what is at the top, yet sometimes he will not; and even when he does see, he does not see fully. It is different when a person looks from the top of the mountain to the foot; and that is why the mystic goes to the cause, and sees from the cause to the effect.