For those Sufis with Gnostic leanings (which can be found in Bektashi or Mevlevi orders), Ruh is a soul-spark, immortal entity and transegoic "true self", similar to the Christian concepts of "synteresis" or "Imago Dei", or Vedantist notion of "jiva", as well as Tibetan Buddhist "shes-pa", principle of consciousness and Taoist "shen" or spirit. But, the majority of the Sufis would consider this an unnecessarily extravagant speculation and would stick to the more orthodox notion of dormant spiritual faculty that needs to be worked upon by constant vigil and prayer in order to achieve the Tajliyya-I-Ruh, or Illumination of the spirit. Ironically, this spiritual faculty is frequently referred to in terms one encounters in connection with Nafs- "blind" life force or life current that needs to be purified by strict religious observances in order to achieve illumination.