However, in Kirmani’s system, the First Intellect emanates two beings: the Second Intellect and the Potential Intellect, which is primordial Matter and Form. The Second Intellect emanates eight other Intellects in successive emanation, while the nine spheres of the Aristotelian cosmos proceed from the activities of each of the Intellects upon the Potential Intellect. The Potential Intellect—an emanation of the First Intellect subordinate in rank to the Second Intellect—is responsible for the physical world. Tatsuya Kikuchi suggests that this Potential Intellect is probably not equivalent to the Tayyibi Tenth Intellect, and the Tenth Intellect in Kirmani’s system does not maintain any special significance above the other separate intellects. The second Tayyibi "da’i mutlaq", Ibrahim al-Hamidi, introduced a more mythical, gnostic, mystical “drama in heaven” into Tayyibi doctrine. He launched a new stage of medieval Tayyibi and Ismaili cosmology wherein the Tenth Intellect takes on special significance, although he is not singularly responsible for this evolution- he did not introduce or utilize the terms “Universal Adam” and “Partial Adam,” for example. In addition to the influences of Kirmani and Hamidi, there are also traces of earlier Zoroastrian and Manichaean ideologies present in the Tayyibi understanding of the Tenth Intellect. For example, the souls of initiates into the "da’wah" are attached to particles of light, and through time, these particles join into a temple of light, the imamate, and at the end of each time cycle the last imam rises with his temple of light (as the Universal Adam did) and takes the place of the Tenth Intellect. This understanding of light as affiliated with spiritual ascent is reminiscent of Manichaean cosmology. Further, as Henry Corbin asserts, there may be a connection between the Spiritual Adam and the Zoroastrian divinity Zurvan, who engendered Ahura Mazda and Angra Mainyu and who strays from pure goodness into an opacity between good and evil, light and dark, in a fashion similar to the fall of the Tenth Intellect.