Did the Mahdi lead the people of the Maghreb to the doctrine of ta'wil and to adopt the Ash'ari school of thought in all [creeds]? Many modern researchers have followed this view. The truth is that the Ash'ari school was a prepared source for the Mahdi's opinions. However, this source was not as extensive as the aforementioned researchers depicted it. The Mahdi agreed with the Ash'aris in some of his opinions, but he differed with them in many others, to the extent that if we counted what he differed with them on, we would find it to be more than what he agreed with them on. We mention among the issues in which he agreed with the Ash'aris: divine power and will, human action, punishment and reward. We mention among the issues in which he completely or partially differed with them: the vision, the attributes in their relation to the divine essence, the imposition of what is beyond one's capacity, and faith. As for the issue of ta'wil, which was the starting point for many researchers to describe the Mahdi as an Ash'ari, he was contradictory in it between his theoretical statement and what his thinking followed. While we see him in his reports on the absolute transcendence of the divine essence, adhering to complete ta'wil by negating anything that might resemble creatures, we see him saying about the literal attributes: "What is mentioned of the ambiguous verses that suggest resemblance and qualification, such as the verse of istiwā', the hadith of descent, and other ambiguous verses in the Sharia, must be believed in as they came, while negating resemblance."