While it is always well to learn everything one can, it is not good to give in to a superstition. Otherwise it would be better never to have known such things at all. The whole aim of the Sufi is to reach to reality, and anything savoring of superstition must be avoided. And what is color after all? It is an illusion. What is number? It is an illusion. What are forms? They are illusions also. It is interesting to a certain extent to know about these things and distinguish them; it gives you a certain knowledge. But since they are all illusions, how can it be worthwhile to give oneself absolutely to them and so neglect the unfolding of the self, besides at the same time neglecting the search for the reality, the only aim of the soul?