The Cause is an explanation for the poem:

It states that a great scholar in Khorasan had sent a letter in verse form asking questions on the Sufi path. Shabustari was asked to respond in kind and did so, creating the verses publicly on the fly as he spoke. This poem is the record of his response.

Vs 34-70

Notes on the cause

first ~~~ second ~~~ third ~~~ fourth ~~~ fifth ~~~ sixth