Jalal Ad-Din Rumi, the towering light of Sufi wisdom is rightly known as Moulavi Ma'anavi, the gnostic scholar - in the Muslim world. He has been considered as the peak of spiritual excellence and insightful divine sagaciousness by the seekers of the inner meanings of words and worlds. Everyone with a genuine bend for true knowledge turns to Rumi, irrespective of caste and creed, to quench their thirst.
When Rumi refers to Islam, he is talking about The way. He is not talking about the preconceived notions that people have about Islam today, or even in his day, but the spiritual path itself and the religious tradition.
Fihi Ma Fihi is the most famous prose work of Rumi. It's a collection of 71 discourses on various topics directly connected to everyday life. Rumi delivered these speeches to middle audience. The title of the book means 'In it what is in it' or 'It is what it is'. It is said that the Sultanul Walad, the eldest son of Rumi, compiled the speeches with the help of his other disciples, Rumi explains their important principles of Sufism in transparent terms in this book. Fihi Ma Fihi can be considered as a right introduction to Mathnavi. Fihi Ma Fihi provides explanations and keys to unlock the meaning of the Mathnavi. Rumi's most famous work.
The two works were written parallel to each other, and contain many references and stories that are continued from one to the other.