De L'Espirit or Essays on the Mind and Its Several Faculties is a philosophical work written by French philosopher Claude Adrien Helvetius. First published in 1758, the book explores the nature of the human mind and its various faculties such as reason, memory, imagination, and perception. Helvetius argues that all human knowledge and behavior can be traced back to the influence of external stimuli on the mind. He also suggests that education and social environment play a crucial role in shaping an individual's mental faculties. The book was controversial at the time of its publication due to its emphasis on the role of environment and education in shaping human behavior, which challenged the prevailing view of innate human nature. Despite this controversy, De L'Espirit remains an important work in the history of philosophy and psychology.1809. Translated from the French. To which is now prefixed a life of the author. Swiss-French tax collector, philanthropist and Enlightenment philosopher, Claude-Adrien Helvetius is widely regarded as the father of utilitarianism. Helvetius's principle work, De l'esprit, was condemned by the Sorbonne, the Pope and the Parliament of Paris and burnt by the public executioner, ensuring that it was read more than any other book of the time.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.