Though we know _mind_, then only _relatively_, in the series of feelings, of which we are conscious, as we know matter relatively in the series of phenomena, which it exhibits to our observation, we have, in this relative knowledge, subjects worthy of the contemplation of beings permitted, in these shadowings of a higher power, to trace some faint image of the very majesty which formed them. Even of the humblest mind, as we have seen, the various affections, sensitive, intellectual, and moral, that arise in it as affections of our common nature, are truly admirable; and what an increase of sublimity do they acquire, in minds of higher powers! But still, it must be remembered, that even in minds the most sublime, as much as in the most humble, all which can be truly known is the successive phenomena which they exhibit, not the essence of the spiritual substance itself; and that, even of these successive phenomena, though we become gradually acquainted with more and more, we probably never can arrive at any bound which is to limit their number. The susceptibilities of the mind, by which, in different circumstances, it may exist in different states, are certainly as truly infinite as the space which surrounds us, or as that eternity which, in its progress, measures the successions of our feelings, and all the other changes in the universe. Every new thought, or combination of thoughts, is in truth a new state or affection, or phenomenon of the mind, and, therefore, a proof of the susceptibility of that new affection, as an original quality of the mind; and every rise in knowledge, from age to age, and from inquirer to inquirer, is thus only the developement of susceptibilities, which the mind possessed before, though the circumstances which at last called them forth, never existed till the moment of the developement. What should we think of the half-naked savage of some barbarous island, if, in the pride of his ignorance, he were to conceive his own thoughts and feelings, to be the noblest of which the human intellect is capable? and, perhaps, even the mind of a Newton, is but the mind of such a savage, compared with what man is hereafter to become. FOOTNOTES: [33] Voltaire Œuvres, tom. xiv. p. 99-101. 4_to_ _Edit._ of 1771. [34] Inquiry into the Human Mind, Introd. p. 7. 8vo. _Edit._ [35] Young's Night Thoughts, vii. v. 392-397. [36] Seneca de Beneficiis, lib. iii. c. 18. LECTURE X. THE SAME SUBJECT CONTINUED. Gentlemen, after laying down the general laws of physical inquiry, I had begun, in the conclusion of my last Lecture, to consider them, more particularly in their relation to the study of mind.