1) Rajab al-Bursi was a 15th century Twelver Shi'a scholar from Iran who wrote an influential but controversial text called Mashareq Anwar al-Yaqeen focusing on extreme devotion to the Imam.
2) The text justified extreme Imamology through specialized Quranic interpretations, hagiographies of the Imams, and apocryphal sermons attributed to Ali ibn Abi Talib.
3) Bursi's views were dismissed by many Shi'a scholars as theological extremism but his poetic skill was praised, while others condemned him for associating numerical values to letters to find hidden meanings.