Published in 1543, this work by the Spanish philosopher and theologian Johannes Ludovicus Vives is a treatise on the nature of the soul and its relationship with the body. The book is divided into three parts, each dealing with a different aspect of the soul: its essence, its faculties, and its operation. Also included is a work by Viti Amerbachius on the same subject. This is a foundational text in the study of the soul and consciousness, and...