Why some people can’t picture stuff in their heads

Published in 1890, 'The Principles of Psychology' is a two-volume work that lays the groundwork for understanding psychological phenomena through a scientific lens. William James discusses the relationship between mental processes and their underlying physical conditions, introducing key concepts such as the 'stream of consciousness,' the James–Lange theory of emotion, the importance of habit, and the concept of will. The book is based on James's classroom lessons and avoids metaphysical explanations, focusing instead on empirical observations and physiological processes. It has been influential in shaping the field of psychology and continues to be relevant today.