   This attempt to separate the rational faculty from the internal senses is echoed in Avicenna's treatment of the stages in the development of the intellect. He views the entire cognitive process in which the internal senses were preoccupied as a necessary (for most people) but insufficient condition for possessing true knowledge. The efforts of the internal senses are seen in some of his major compositions as having but a propadeutic effect on the soul, preparing it to receive the universal intelligible notions that are its ultimate goal and, ultimately, its sole concern. These intelligible ideas are not abstracted from the imagination, as Aristotle would have it, but come from the universal Agent Intellect, transforming the purely potential and passive intellect into an  acquired intellect (‘aql mustafâd).[38] This is an active state of cognition, when the intellect is actively conjoined to its intelligible object. Ultimately, this conjunction is with the Agent Intellect, the source of all forms on earth.