Epistola de anima ad Alcherum
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The Epistola de anima ad Alcherum (Letter to Alcher on the Soul) is a significant work by Isaac of Stella, a 12th-century English monk, philosopher, and theologian. This treatise, composed around 1162, is a compendium of psychology that synthesizes Neoplatonic and Aristotelian philosophies within the Cistercian tradition.1
Isaac of Stella explores the nature of the soul, proposing a tripartite division into rational, appetitive, and emotional functions, drawing from Platonic thought. His theory of knowledge integrates Aristotelian concepts of sense perception and reasoning with Neoplatonic ideas about the intellect's capacity to grasp eternal truths and the divine. The work also reflects mystical influences, suggesting that ultimate knowledge comes through divine illumination and employing a via negativa approach to understanding God by negating human qualities. This treatise served as a foundation for the later De spiritu et anima.1
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