The path of self-knowledge has this aim in view, for no one can know himself unless he turns inwards away from sense-perception, and unless he learns what to seek for. By oneself this is impossible. A man cannot get to know himself alone. His imagination stands in the way. There is no sufficient point in himself from which he can view himself aright, no sufficient knowledge. The establishing of this point is a matter of long work upon oneself with the assistance of those in whom this point is already established.