Note 889 — XVI. OF FREETHINKERS.853
Henri Van Laun translation
According to Descartesʼ Discours de la Méthode, animal spirits, which are so often mentioned in the philosophical and moral works of his time, “are like a very subtle mind, or rather like a very pure and bright flame, which is continually and in great abundance ascending from the heart to the brain, proceeds from thence through the nerves into the muscles, and produces motion in all the members of the body.”