 In the context of the theories of nafs al-ʾamr proposed by later Muslim thinkers, external senses, estimation, and intellect all cooperate with each other to give us a conception of mathematical entities as they are in nafs al-ʾamr. However, the process through which we can have access to and know about the realm of nafs al-ʾamr is by no means less mysterious than the role of the Active Intellect in Avicenna’s philosophy.