Of all these several sorts of pleasures and pains, there is scarce any one which is not liable, on more accounts than one, to come under the consideration of the law. Is an offense committed? It is the tendency which it has to destroy, in such or such persons, some of these pleasures, or to produce some of these pains, that constitutes the mischief of it, and the ground for punishing it. It is the prospect of some of these pleasures, or of security from some of these pains, that constitutes the motive or temptation, it is the attainment of them that constitutes the profit of the offense. Is the offender to be punished? It can be only by the production of one or more of these pains, that the punishment can be inflicted.

Chapter VI

OF CIRCUMSTANCES INFLUENCING SENSIBILITY

I. Pain and pleasure are produced in men's minds by the action of certain causes. But the quantity of pleasure and pain runs not uniformly in proportion to the cause; in other words, to the quantity of force exerted by such cause. The truth of this observation rests not upon any metaphysical nicety in the import given to the terms cause, quantity, and force: it will be equally true in whatsoever manner such force be measured.

II. The disposition which any one has to feel such or such a quantity of pleasure or pain, upon the application of a cause of given force, is what we term the degree or quantum of his sensibility. This may be either general referring to the sum of the causes that act upon him during a given period: or particular, referring to the action of any one particular cause, or sort of cause.

III. But in the same mind such and such causes of pain or pleasure will produce more pain or pleasure than such or such other causes of pain or pleasure: and this proportion will in different minds be different. The disposition which any one has to have the proportion in which he is affected by two such causes, different from that in which another man is affected by the same two causes, may be termed the quality or bias of his sensibility. One man, for instance, may be most affected by the pleasures of the taste; another by those of the ear. So also, if there be a difference in the nature or proportion of two pains or pleasures which they respectively experience from the same cause; a case not so frequent as the former. From the same injury, for instance, one man may feel the same quantity of grief and resentment together as another man: but one of them shall feel a greater share of grief than of resentment: the other, a greater share of resentment than of grief.

IV. Any incident which serves as a cause, either of pleasure or of pain, may be termed an exciting cause: if of pleasure, a pleasurable cause: if of pain, a painful, afflictive, or dolorific cause.

V. Now the quantity of pleasure, or of pain, which a man is liable to experience upon the application of an exciting cause, since they will not depend altogether upon that cause, will depend in some measure upon some other circumstance or circumstances: these circumstances, whatsoever they be, maybe termed circumstances influencing sensibility.

VI. These circumstances will apply differently to different exciting causes; insomuch that to a certain exciting cause, a certain circumstance shall not apply at all, which shall apply with great force to another exciting cause. But without entering for the present into these distinctions, it may be of use to sum up all the circumstances which can be found to influence the effect of any exciting cause. These, as on a former occasion, it may be as well first to sum up together in the concisest manner possible, and afterwards to allot a few words to the separate explanation of each article. They seem to be as follows: 1. Health. 2. Strength. 3. Hardiness. 4. Bodily imperfection. 5. Quantity and quality of knowledge. 6.