our own private good and happiness. The sum of the whole is plainly this: The nature of man considered in his single capacity, and with respect only to the present world, is adapted and leads him to attain the greatest happiness he can for himself in the present world. The nature of man considered in his public or social capacity leads him to right behaviour in society, to that course of life which we call virtue. Men follow or obey their nature in both these capacities and respects to a certain degree, but not entirely: their actions do not come up to the whole of what their nature leads them to in either of these capacities or respects: and they often violate their nature in both; _i.e._, as they neglect the duties they owe to their fellow-creatures, to which their nature leads them, and are injurious, to which their nature is abhorrent, so there is a manifest negligence in men of their real happiness or interest in the present world, when that interest is inconsistent with a present gratification; for the sake of which they negligently, nay, even knowingly, are the authors and instruments of their own misery and ruin. Thus they are as often unjust to themselves as to others, and for the most part are equally so to both by the same actions. SERMON II., III. UPON HUMAN NATURE. ROMANS ii. 14. _For when the Gentiles_, _which have not the law_, _do by nature the things contained in the law_, _these_, _having not the law_, _are a law unto themselves_. As speculative truth admits of different kinds of proof, so likewise moral obligations may be shown by different methods. If the real nature of any creature leads him and is adapted to such and such purposes only, or more than to any other, this is a reason to believe the Author of that nature intended it for those purposes. Thus there is no doubt the eye was intended for us to see with. And the more complex any constitution is, and the greater variety of parts there are which thus tend to some one end, the stronger is the proof that such end was designed. However, when the inward frame of man is considered as any guide in morals, the utmost caution must be used that none make peculiarities in their own temper, or anything which is the effect of particular customs, though observable in several, the standard of what is common to the species; and above all, that the highest principle be not forgot or excluded, that to which belongs the adjustment and correction of all other inward movements and affections; which principle will of course have some influence, but which being in nature supreme, as shall now be shown, ought to preside over and govern all the rest. The difficulty of rightly observing the two former cautions; the appearance there is of some small diversity amongst mankind with respect to this faculty, with respect to their natural sense of moral good and evil; and the attention necessary to survey with any exactness what passes within, have occasioned that it is