Texts on the universality of sufism
The Unity of Knowledge
Idries Shah
The connection between the ancient practical philosophies and the present ones is seen to have been based upon the higher-level unity of knowledge, not upon appearances. This explains why the Muslim Rumi has Christian, Zoroastrian and other disciples; why the great Sufi ‘invisible teacher’ Khidr is said to be a Jew; why the Mogul Prince Dara Shikoh identified Sufi teachings in the Hindu Vedas, yet himself remained a member of the Qadiri Order; how Pythagoras and Solomon can be said to be Sufi teachers. It also explains why Sufis will accept some alchemists to have been Sufis, as well as understanding the underlying developmental factors in Rumi’s evolutionary philosophy, or Hallaj’s ‘Christianity’; why, indeed, Jesus is said to stand, in a sense, at the head of the Sufis.