The interpretation of this form was given by the mystics of Arabia, who called it Qasab-e Kousein, which means the meeting of the eyebrows. When a person looks upward, naturally his eyebrows come closer to each other. The idea is, that as the spirit soars upward the tendency of the soul is to rise from duality to unity, and by working with these two particular forms they have arrived at such perfection that if the same form were continued for a hundred thousand years one could never tire of it.