Hence, the difference is this: that you will not believe that the stick is curved, but it only appears to be bent. The problem is divided into two different levels. On the level of knowing, the stick is straight. You say goodbye i say hello doormat. At the level of seeing, it is curved. There is no illusion above either of these levels. On the level of living there is the body which is external and on the level of existence there is the atma the soul. For those who know, this world is not lost. To him the world is just as it is to you. Perhaps, to that person the world was even more clear in its perspective and appearance.