2949. It may also be illustrated by every point [memento] of thought and speech. Man thinks and speaks analytically, or according to all the most recondite [arcanissima] things of analytic philosophy, and yet does not know it, that thus he speaks and acts. But when he aims to know how the matter is, and so thinks [speaks and acts] according to knowledge [scientia], he then averts himself from most recondite things, which lead him, and circumscribes [finit] himself: and so far as these things are present and rule, so far does he become insane and stupid. So far as he [is conducted] by a most recondite leading [ductu], and not by himself so far is he in the faculty of understanding, and in a state of being affected according to these things. - l748, August 27. This was still further confirmed by the muscles. When man acts from will, if he knows what muscles and what fibers act, and directs his mind to muscle and fiber, so that he wishes so to command it, when he intends [an act], then the muscle cannot act; if he remits [his efforts] it acts.