"The Anurag Sagar of Kabir" is an epic poem attributed to Guru Kabir that probably was authored by Sant Dharamdas or someone in the Dharamdasi branch of the Kabir lineage after the time of Kabir. It is a faithful presentation of the teachings of the Masters including Kabir. Anurag Sagar has become a great spiritual classic of the East, a kind of Sant Mat "Book of Genesis" or "Gospel" of the Four Yugas of time, vast epochs referred to as: Satya Yuga, Treta Yuga, Dvapara Yuga, and Kali Yuga.
In dozens of Sant texts used in the Kabir line of Masters Kabir represents the universal Master, and his gurumukh disciple Dharamdas represents the satsangi, the disciple. These texts feature a dialgoue between student and Master, Q and A sessions between "Kabir" and "Dharamdas" that provide the spiritual seeker much insight about The Path of the Masters.
Anurag Sagar occupies a very unusual place in the literature of the Masters; it is at once one of the most venerated and least known of all esoteric books. It is the Masters themselves who venerate it, and they have often made use of it in one way or another; they themselves are able to read it, but most of their disciples know it only by hearsay, mostly because it is written in the pre-Hindi dialect called Braj which, according to the leading modern scholar on Kabir, had "already by Kabir's time. . .become the lyrical language par excellence" but which is extremely difficult for modern Indians to read; it relates to Hindi as spoken today somewhat as Chaucerian or Middle English relates to current English.