In this thought-provoking exploration, D. G. Garan seeks to uncover the hidden laws governing human pleasure and emotional value, aligning psychological causality with modern scientific principles. Drawing upon philosophy, behaviorism, Gestalt theory, and psychoanalytic insights, Garan argues that pleasure perceptions—and human motivations—are inherently relative rather than absolute. Structured in multiple sections, the book guides readers from a critique of scientism through discussions on conditioning, emotional attachment, and cognitive relativity, culminating in the formulation of a "psychological causal law." At nearly 500 pages, this ambitious work offers a rigorous, interdisciplinary approach for psychologists, philosophers, educators, and anyone interested in the foundations of human behavior and affect. It remains a rare mid-century attempt to reconcile subjective experience with objective explanation in psychology.