   Aristotle's philosophy of mind in Islamic philosophy is a combination of what we would today call psychology and physiology, and is not limited to investigations of our rational faculty. However important, the “mind” or intellect, with its practical and theoretical aspects, is only part of the falâsifa's “science of the soul.” Their main sources are found in three Aristotelian treatises: On the Soul (De anima), On Sense and Sensibilia (De Sensu et Sensibili), and On Memory and Recollection (De Memoria et Reminiscentia). The last two belong to a series of nine short physical treatises, called accordingly Parva Naturalia, and include two that deal with the related topic of dreams and prophesying by means of dreams.