In the first place, leprosy is undoubtedly selected to be a special type of sin, on account of its extreme _loathsomeness_. Beginning, indeed, as an insignificant spot, "a bright place," a mere scale on the skin, it goes on spreading, progressing ever from worse to worse, till at last limb drops from limb, and only the hideous mutilated remnant of what was once a man is left. A vivid picture of the horrible reality has been given by that veteran missionary and very accurate observer, the Rev. William Thomson, D.D., who writes thus: "As I was approaching Jerusalem, I was startled by the sudden apparition of a crowd of beggars, sans eyes, sans nose, sans hair, sans everything.... They held up their handless arms, unearthly sounds gurgled through throats without palates,--in a word, I was horrified."[29] Too horrible is this to be repeated or thought of? Yes! But then all the more solemnly instructive is it that the Holy Spirit should have chosen this disease, the most loathsome of all, as the most fatal of all, to symbolise to us the true nature of that spiritual malady which affects us all, as it is seen by the omniscient and most holy God.
[29] "The Land and the Book," vol. i., pp. 530, 531.
But it will very naturally be rejoined by some; Surely it were gross exaggeration to apply this horrible symbolism to the case of many who, although indeed sinners, unbelievers also in Christ, yet certainly exhibit truly lovely and attractive characters. That this is true regarding many who, according to the Scriptures, are yet unsaved, cannot be denied. We read of one such in the Gospel,--a young man, unsaved, who yet was such that "Jesus looking upon him loved him" (Mark x. 21). But this fact only makes the leprosy the more fitting symbol of sin. For another characteristic of the disease is its _insignificant and often even imperceptible beginning_. We are told that in the case of those who inherit the taint, it frequently remains quite dormant in early life, only gradually appearing in later years. How perfectly the type, in this respect, then, symbolises sin! And surely any thoughtful man will confess that this fact makes the presence of the infection not less alarming, but more so. No comfort then can be rightly had from any complacent comparison of our own characters with those of many, perhaps professing more, who are much worse than we, as the manner of some is. No one who knew that from his parents he had inherited the leprous taint, or in whom the leprosy as yet appeared as only an insignificant bright spot, would comfort himself greatly by the observation that other lepers were much worse; and that he was, as yet, fair and goodly to look upon. Though the leprosy were in him but just begun, that would be enough to fill him with dismay and consternation. So should it be with regard to sin.
And it would so affect such a man the more surely, when he knew that the disease, however slight in its beginnings, was certainly _progressive_. This is one of the unfailing marks of the disease. It may progress slowly, but it progresses surely. To quote again the vivid and truthful description of the above-named writer, "It comes on by degrees in different parts of the body: the hair falls from the head and eyebrows; the nails loosen, decay, and drop off; joint after joint of the fingers and toes shrinks up and slowly falls away; the gums are absorbed, and the teeth disappear; the nose, the eyes, the tongue, and the palate are slowly consumed; and, finally, the wretched victim sinks into the earth and disappears."
In this respect again the fitness of the disease to stand as an eminent type of sin is undeniable. No man can morally stand still. No one has ever retained the innocence of childhood. Except as counteracted by the efficient grace of the Holy Spirit in the heart, the Word (2 Tim. iii. 13) is ever visibly fulfilled, "evil men wax worse and worse." Sin may not develop in all with equal rapidity, but it does progress in every natural man, outwardly or inwardly, with equal certainty.