The position of silent knowledge is called the third point because in order to get to it one has to pass the second point, the place of no pity.
Every human being has a capacity for that fluidity. For most of us, however, it is stored away and we never use it, except on rare occasions which are brought about by sorcerers, or by dramatic natural circumstances, such as a life-or-death struggle.
Only a human being who is a paragon of reason can move his assemblage point easily and be a paragon of silent knowledge. Only those who are squarely in either position can see the other position clearly. That was the way the age of reason came to being. The position of reason was clearly seen from the position of silent knowledge.
The one-way bridge from silent knowledge to reason is called "concern." That is, the concern that true men of silent knowledge have about the source of what they know. And the other one-way bridge, from reason to silent knowledge, is called "pure understanding." That is, the recognition that tells the man of reason that reason is only one island in an endless sea of islands.

A human being who has both one-way bridges working is a sorcerer in direct contact with the spirit, the vital force that makes both positions possible.