Here are some notes from http://www.muslimhope.com/Sufis.htm:
Originally Posted by tilusio
Sufiism says that true religion is inner truth, not outer practice.
Strict Islamic Law and the five pillars of Islam are like a "schoolmaster" that Sufis say is fine for others, but they have gone beyond the need for it. Instead, Sufis follow books that other Muslims do not.
Kugu: in fact, there is a verse of the qu'ran in which Muhammad says that god prefers people who do good things around them than people who are complete assholes but respect all the rules... etc. I told that to my mother in law when she was challenging me saying that my wife wasn't a good muslim so I read her she that verse; the next day, she called for a religious council with the elders of the family and never challenged me again about religious. . Actually whenever I tell a fellow muslim that I am sufi they usually avoid talking with me about islam as they guess I know the qu'ran better than them.
People can be One with God is the key belief of Sufiism. Thus a Sufi who is "one with God" could be considered Allah himself, because he is one with Allah. This is similar to the heretical Christian mysticism of the Middle Ages, who emphasize experience and say they themselves could be God.
Kugu: as I said above ... I believe that evolution as in universal darwinism, life, genetic programming as in computer science is the only plausible thing around us that matches the definition of a god who's everywhere and can do everything...
Pleasure or Intoxicating experience is a distinctive of Sufiism. For some this means just an emotional experience. This is often compared to being drunk with wine, and other Sufis do drink wine and get drunk. Sufis can excuse the many references to wine and even taverns in their religion as being a metaphor for spiritual ecstasy. After all, even the hadiths say Muslims will drink wine in Heaven. However, many of them do believe it is OK to drink alcohol too. A few Sufi sects smoke Hashish as part of their religion, but the majority do not.
I recommend this really cool book, The Sufies by Idries Shah and prefaced by Robert Graves (I, Claudius, The White Goddess, ...). The chapter entitled, "The Subtleties of Mulla Nasrudin" is a really fun read (my main eve character was called after mullai.)
http://rapidshare.com/files/13619485..._Shah.pdf.html or https://www.amazon.com/Sufis-Idries-Shah/dp/0385079664