Our Lord, when on earth, went about healing the sick by the sole power of words. A notable instance of this is the case of the centurion of Capernaum, who deemed himself unworthy of the honor of having Christ enter his dwelling, in order to cure his servant, who lay sick of the palsy. "But speak the word only," he said, "and my servant shall be healed." And the Master replied: "Go thy way; and as thou hast believed, so be it done unto thee." And his servant was healed in the self-same hour. That evening, we are told, many that were possessed with devils were brought unto him; and he cast out the spirits with his word, and healed all that were sick.[32:2] The popularity of Scriptural texts in primitive therapeutics is doubtless largely due to the many wonderful cures wrought by words, which are recorded in the Bible. Usually, in the Gospels, the healing word is addressed to the patient, but occasionally to his master, or to one of his parents. Whenever the belief in the power of sacred words appears outside of Holy Writ, it is generally expressed in the guise of a superstitious formula. This belief is found, however, in the mystical tenets of the ancient Jewish sect, known as the Essenes. It is also clearly stated in the Zend Avesta, as follows: "One may heal with herbs, one may heal with the Law, one may heal with the Holy Word; amongst all remedies, this is the healing one, that heals with the Holy Word; this one it is that will best drive away sickness from the body of the faithful; for this one is the best healing of all remedies."[33:1] The religious and devotional sentences, which are so commonly seen above the entrances of dwellings in Germany and other European lands, and the passages from the Koran similarly used among Moslems, are not necessarily evidence of the piety of the members of a household. For, as has been remarked, these sentences are often regarded merely as protective charms.[33:2] According to an old Welsh custom, fighting-cocks were provided with prophylactic amulets before entering the arena. These amulets consisted of biblical verses, inscribed on slips of paper, which were bound around the cocks' legs. A favorite verse thus used was Ephesians, VI, 16: "Taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked."[33:3] Some of the old English medical verse-spells are sufficiently quaint exponents of popular credulity. The following, for example, was in vogue as a remedy for cramp in the leg:-- "The Devil is tying a knot in my leg, Mark, Luke and John, unloose it, I beg."[34:1]