I would likewise observe here, that the VIIIth Proposition in the preceding Section, viz. _That there is neither Merit nor Demerit_, &c. is here again demonstrated, as infallibly, tho' in another manner: For since _Freedom from Uneasiness_ is the End of all our Actions, how is it possible for us to do any Thing disinterested?--How can any Action be meritorious of Praise or Dispraise, Reward or Punishment, when the natural Principle of _Self-Love_ is the only and the irresistible Motive to it? III. _This_ Desire _is always fulfill'd or satisfy'd_, In the _Design_ or _End_ of it, tho' not in the _Manner_: The first is requisite, the latter not. To exemplify this, let us make a Supposition; A Person is confin'd in a House which appears to be in imminent Danger of Falling, this, as soon as perceiv'd, creates a violent _Uneasiness_, and that instantly produces an equal strong _Desire_, the _End_ of which is _freedom from the Uneasiness_, and the _Manner_ or Way propos'd to gain this _End_, is _to get out of the House_. Now if he is convinc'd by any Means, that he is mistaken, and the House is not likely to fall, he is immediately freed from his _Uneasiness_, and the _End_ of his Desire is attain'd as well as if it had been in the _Manner_ desir'd, viz. _leaving the House_. All our different Desires and Passions proceed from and are reducible to this one Point, _Uneasiness_, tho' the Means we propose to ourselves for expelling of it are infinite. One proposes _Fame_, another _Wealth_, a third _Power_, &c. as the Means to gain this _End_; but tho' these are never attain'd, if the Uneasiness be remov'd by some other Means, the _Desire_ is satisfy'd. Now during the Course of Life we are ourselves continually removing successive Uneasinesses as they arise, and the _last_ we suffer is remov'd by the _sweet Sleep_ of Death. IV. _The fulfilling or Satisfaction of this_ Desire, _produces the Sensation of_ Pleasure, _great or small in exact proportion to the_ Desire. _Pleasure_ is that Satisfaction which arises in the Mind upon, and is caus'd by, the accomplishment of our _Desires_, and by no other Means at all; and those Desires being above shewn to be caus'd by our _Pains_ or _Uneasinesses_, it follows that _Pleasure_ is wholly caus'd by _Pain_, and by no other Thing at all. V. _Therefore the Sensation of_ Pleasure _is equal, or in exact proportion to the Sensation of_ Pain.