Psychologia Empirica

who, in the art of invention, ought to see with open eyes and not be blinder than a mole. The Logic of Probables teaches the singular use of the faculties of the soul, and one of the greatest utility. Wherefore, when this by far most useful part of philosophy is cultivated, not only he who endeavors to reduce the same to the form of an art, but also the others, who will devote their efforts to rightly understanding its precepts and transferring them to practice, will use no other spectacles than those which empirical psychology provides, where, in distinguishing and recognizing individual things, they will not allow their acuteness to be found wanting. Moral philosophy demonstrates the correct direction of free actions. There is, therefore, no one in this most noble part of philosophy who does not yet know all the faculties of the human soul by their appearance. Indeed, there is no other reason why, until now, philosophers have not reduced the entire practice of virtues and morals to the form of an art, other than that they have by no means perceived how, through the laws which the faculties of the soul follow, the same are subjected to our will and the free actions are directed by their use to where they ought to tend, so that, to that extent, the individual human actions—