Self-control is an attribute which distinguishes man from the animal; both have their appetites and passions, but it is man alone who can control them. It is therefore not surprising if Sufis are sometimes seen submitting themselves to most awkward and uncomfortable practices. At first sight it may appear strange, yet on closer observation it becomes obvious that they prescribe this for themselves in order to gain self control, which alone gives the assurance of a dependable and lasting happiness.