There can be no doubt that excess in drinking hath put an end to the lives of many individuals; and it hath been observed, that such as attempt to preserve themselves from the plague by the use of strong liquors, have generally fallen sacrifices to it;[31] but this cannot prove that such excess would have brought on the distemper without some other cause. It hath been certainly found, that excess in drinking or eating, excess in venery, excessive fatigue by labour, watching, study, &c. will all make an epidemic disease more violent when it attacks a particular person; but no experience hath yet shown that the _first_ person seized with an epidemic always fell under this description. All that can be said on the subject is, that, by such excesses as have already been described, the body is prepared for receiving the disease, by an exhaustion, or evaporation (if we please to call it so) of the vital principle; as wood is prepared for burning by the evaporation of its moisture; but as wood, however dry, will not burn without the contact or application of fire, so neither will the body, though ever so well prepared, be attacked by any epidemic, unless the true cause of that epidemic be also applied. [31] See Sec. IV. Preventives of the Plague. Thus we are still disappointed in our attempts to discover the origin of the plague. We have seen that the most unhealthy climates in the world do not produce it of themselves; neither can the conduct of any individual bring it upon himself, without an unknown _something_, which nobody has yet found out. It was this difficulty of finding out the natural cause, which certainly induced by far the greatest number of writers on the subject to ascribe it to Divine Power; and even as late a writer as Dr. Hodges tells us, that he believes in the _to Theion_, the “finger of God,” in the plague, as much as any body. As for those who have endeavoured to account for the origin of this distemper from an inquiry into natural causes, and conclusions drawn from the late experiments on air, they have totally failed; as will be fully elucidated in the following section.