Of course, that art has its rules and regulations which are not applicable to each in the same way, although the science is one and the same. Still, when a physician receives different people, to each he gives a separate prescription, for each condition, to get it right. In the same way with the Sufi esoteric work, every person that is initiated does not get the same thing to do, and in a different way. All the same it is one art or science, a science of tuning oneself within.