All that is taught in the Sufi esoteric studies and by Sufi practices is taught in order to arrive little by little, gradually, at that fulfillment which is called mastery. Mastery comes from the evolution of the soul, and the sign of mastery is to conquer everything that revolts one. That is real tolerance. Souls which have attained to that spiritual mastery show it not only with people, but even with their food. There is nothing that the soul which has gained mastery would not touch, though it may not like it or approve of it.