Those who take the trouble to read carefully the work that am now publishing will, unless am mistaken, enter into this frame of mind; for in it demonstrate in several ways that our senses, our imagination, and our passions are altogether useless for discovering the truth and our good, that, on the contrary, they dazzle us and seduce us in every instance, and generally that all the knowledge the mind receives through the body, or on account of some motion occuring in the body,