A concise philosophical account examines the soul as a composite of distinct powers, classifying vegetative, sensory, and rational faculties and showing how perception, imagination, memory, and choice emerge from their interplay. It treats intellective activity in terms of potential and actual intellects and posits an active intellect that abstracts universals from sense data. The relation between soul and bodily organs is analyzed, linking psychological operations to physiological conditions while arguing for the soul's immaterial aspects and its possible persistence after bodily death. Analytical definitions, logical proofs, and illustrative observations are combined to present a compact handbook of medieval psychological theory for learners and patrons.