In the name of Allah, the Most Gracious, the Most Merciful

The Book of the Gnostic’s Proof in Establishing Justice against the Divergent and the Opponent.

Authored by the Imam, the Scholar, the Jurist [Hamza ibn Ali ibn Shu'ba al-Harrani].

And this is what he transcribed for his Treasurer (Khazin), the Prince, the Master [Abu al-Hasan Ali ibn Ja'far]—may Allah elevate their ranks and multiply their good deeds. This was in the month of Rabi‘ al-Akhir in the year four hundred and eight.

It is among the most majestic and highest books of the People of Monotheism (Ahl al-Tawhid), due to its reliance on establishing rational and transmitted proofs regarding the affirmation of [Divine] Power and the negation of the Image.

408 AH corresponds to 1017 AD