New Classification of the Internal Affections, 518 LECTURE XXXIV. On Simple Suggestion, 523 Advantages resulting from the Principle of Suggestion, 526 On Mr Hume's Classification of the Associating or Suggesting Principles, 532 LECTURES ON THE PHILOSOPHY OF THE HUMAN MIND. LECTURE I.--(INTRODUCTION.) GENTLEMEN, The subject on which we are about to enter, and which is to engage, I trust, a considerable portion of your attention for many months, is _the Philosophy of the Human Mind_,--not that _speculative_ and _passive_ philosophy only, which inquires into the nature of our intellectual part, and the mysterious connexion of this with the body which it animates, but that _practical_ science, which relates to the duties, and the hopes, and the great destiny of man, and which, even in analyzing the powers of his understanding, and tracing all the various modifications of which it is individually susceptible, views it chiefly as a general instrument of good--an instrument by which he may have the dignity of co-operating with his beneficent Creator, by spreading to others the knowledge, and virtue, and happiness, which he is qualified at once to enjoy, and to diffuse. “Philosophy,” says Seneca, “is not formed for artificial show or delight. It has a higher office than to free idleness of its languor, and wear away and amuse the long hours of a day. It is that which forms and fashions the soul, which gives to life its disposition and order, which points out what it is our duty to do, what it is our duty to omit. It sits at the helm, and in a sea of peril, directs the course of those who are wandering through the waves.” “Non est philosophia populare artificium, nec ostentationi paratum; non in verbis sed in rebus est. Nec in hoc adhibetur ut aliqua oblectatione consumatur dies, ut dematur otio nausea. Animum format et fabricat, vitam disponit, actiones regit, agenda et omittenda demonstrat, sedit ad gubernaculum, et per ancipitia fluctuantium dirigit cursum.” Ep. 16.