Anyway the mystics trace the chain of their spiritual leaders to Imam Ali through their early preceptors. According to the Shi'ah belief, this quality is possessed by the Imams 5 and through them can be acquired by their true followers. This being the Shi'ah conception of Wilayat, the great Sufis may be regarded as the proponents of the Shi'ah doctrine, though apparently they followed the Sunni school. What we mean to say is that the Shi'ites being the followers of an infallible Imam, already possess all that is indicated by the mystics. As a matter of fact the Qutb or the perfect man conceived by the mystics does not actually exist anywhere outside the Shi'ite world.
Mere presumption is obviously quite a different thing.
It may be mentioned here that some authentic Sunni books state that the outward form of the Islamic law and Islamic teachings does not explain how to perform spiritual journey. On this basis the Sufis say that they have individually discovered certain methods and ways which facilitate this journey. They also claim that their methods have gained Divine sanction in the same way as previously monasticism had gained. As such the Sufi leaders included in their programme of spiritual journey whatever rites, rituals and formalities they deemed fit, and asked their disciples to observe them. Gradually a vast and independent system came into being.