But when I am speaking of the plague as a distemper arising from natural causes, we must consider it as it was really propagated by natural means. Nor is it at all the less a judgment for its being under the conduct of human causes and effects; for as the Divine Power has formed the whole scheme of nature, and maintains nature in its course, so the same Power thinks fit to let his own actings with men, whether of mercy or judgment, to go on in the ordinary course of natural causes, and he is pleased to act by those natural causes as the ordinary means, excepting and reserving to himself, nevertheless, a power to act in a supernatural way when he sees occasion. Now it is evident, that, in the case of an infection, there is no apparent extraordinary occasion for supernatural operation; but the ordinary course of things appears sufficiently armed, and made capable of all the effects that Heaven usually directs by a contagion. Among these causes and effects, this of the secret conveyance of infection, imperceptible and unavoidable, is more than sufficient to execute the fierceness of divine vengeance, without putting it upon supernaturals and miracles. The acute, penetrating nature of the disease itself was such, and the infection was received so imperceptibly, that the most exact caution could not secure us while in the place; but I must be allowed to believe--and I have so many examples fresh in my memory to convince me of it, that I think none can resist their evidence,--I say, I must be allowed to believe that no one in this whole nation ever received the sickness or infection, but who received it in the ordinary way of infection from somebody, or the clothes, or touch, or stench of somebody, that was infected before.