But we may discern, that the very Interruption of Pain is some degree of Pleasure; and that the lesser degrees both of Pain and Pleasure have something of a Relative Nature in ’em; a Person that is afflicted with some Pain, finds some Alleviation of it by tumbling and tossing in his Bed; which tumbling and tossing, at another time, would be a sort of Pain; and if any one thinks this ought to be imputed to Phancy, rather than Reality, I answer, ’Tis such a Phancy as none can be free from; and the denying a Person, in such Circumstances, the Liberty of gratifying it, would be the greatest Cruelty, and a high Aggravation of the Pain: Besides, in Pains of the Membranes, proceeding from the Corrosion of Sharp Humours thrown upon ’em, where the Part cannot but be very sensible of the Pain those Particles cause; yet even in this Case, the Spirits may be interrupted or diverted from the performing so acutely their Office of Sensation, by being put into different Motions. I knew a hardy labouring Man, who hapning to be seiz’d with a violent Pain in his Hip, for two or three Nights, as soon as he came to Bed, kept beating his bare Hip with a Bed-staff a great while together, before he could get any Rest, and by that Means blunted the Pain, and tired himself into Sleep; (tho’ afterwards he removed both the Pain and the Cause, by running a Packneedle himself thro’ part of his Hip); now if thus much may be done in the Membranous Parts, where the Cause of the Pain is _ab extra_, what may not be done in Nervous Cases, where the Disorders of the Spirits are the prime Occasion of the Pains, if we can communicate to those Spirits, a Motion contrary to that Motion which occasions the Pains, which certainly may be done, by moderate and agreeable Exercise?