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By the time I had done away with the science of philosophy,
understanding it and marking what was false in it, I realized that this too did
not satisfy my aim in full and that the intellect neither comprehends all it
attempts to know nor solves all its problems. The heresy of the Ta`limiyah
had already appeared and everyone was speaking about their talk of
gaining knowledge of the meaning of things from an infallible Imam who has
charge of the truth. It had already occurred to me to study their views and
become acquainted with what is in their books, when I received a definite
command from His Majesty the Caliph to write a book exposing their
religious system. The fact that I could not excuse myself from doing this


was an external motive reinforcing my original impulse. I began to search
for their books and collect their doctrines. There had already come to my
ears some of their innovated utterances, the product of the thoughts of
contemporary members of the sect, which differed from the familiar
formulations of their predecessors.