"Mystics and Saints of Islam" by Claud Field
"the subject of the Masnavi may be said to be the love of the soul for God as its Origin, to Whom it longs to return, not the submission of the ordinary pious Moslem to the iron despotism of Allah. This thesis is illustrated with an extraordinary wealth of imagery and apologue throughout the six books composing the work. The following fable illustrates the familiar Sufi doctrine that all religions are the same to God, Who only regards the heart:—"
Start reading this book for free: https://read.amazon.com/kp/kshare?asin=B002RKSH7Y&id=8l1MD7IVQJOb3Q2Z4dr-bg