Although both groups shared much in common, there was a fundamental, almost perplexing range of theological convictions and ritual implementations. This book explores the mechanism that accounts for such diversity, arguing for a direct correlation between Sufi multiformity and the agency of the spiritual leader, the Shaikh. Empirical research regarding the authority by which Shaikhs subjectively generate legitimate adaptations that shape the contours of religious belief are lacking. This study is significant, because it focuses on how leadership operates in Sufism, highlighting the primacy of the Shaikh in the selection and appropriation of inherited norms.