And yet I love him. I love him so much and so dearly, that when I sometimes think my life may be but a weary one, I am proud of it and glad of it. I am proud and glad to suffer something for him, even though it is of no service to him, and he will never know of it or care for it.
There is no religion in the world where there is a possibility of spiritual development outside of the context of that religion. This is only a modern invention. For example, Christian mystics were also Christians. They also went to Church and followed Christian laws. Hindu mystics were practicing Hindus; they didn't kill cows and have steak. They follow the Hindu laws and so on and so forth down the line and Sufism is no exception.