Most mystics do not want to read religious wisdom; they want to be it. A postcard of a beautiful lake is not a beautiful lake, and Sufis may be defined as those who dance in the lake.
Huston Smiththe heart of religion is not altered states but altered traits of character. For me, then, the test of a substance's religious worth or validity is not what kind of far-out experience it can produce, but is the life improved by its use? That's the test. Now, on that score, if you remove the "religious cocoon," the experiences don't seem to have much in the way of discernible, traceable effects.
Huston Smith