The powerful influence of music on our intellectual faculties, and consequently on our health, has long been ascertained, either in raising the energies of the mind, or producing despondency and melancholy associations of ideas. Impressed with its sublime nature, the ancients gave it a divine origin. Diodorus tells us that it was a boon bestowed on mankind after the deluge, and owed its discovery to the sound produced by the wind when whistling through the reeds that grew on the banks of the Nile. This science became the early study of philosophers and physicians. Herophilus explained the alterations of the pulse by the various modes and rhythms of music. In the sacred writings we have many instances of its influence in producing an aptitude for divine consolation. The derangement of Saul yielded to the harp of David, and the hand of the Lord came upon Elisha as the minstrel played. In Egypt certain songs were legally ordained in the education of youth, to promote virtue and morality. Polybius assures us that music was required to soften the manners of the Arcadians, whose climate was heavy and impure; while the inhabitants of Cynaethe, who neglected this science, were the most barbarous in Greece. The medical power of harmonious sounds was also fully admitted. We find Pythagoras directing certain mental disorders to be treated by music. Thales, called from Crete to Sparta, cured a disastrous pestilence by its means. Martinus Capella affirms that fevers were thus removed. Xenocrates cured maniacs by melodious sounds, and Asclepiades conquered deafness with a trumpet. In modern times it has been related of a deaf lady that she could only hear while a drum was beating, and a drummer was kept in the house for the purpose of enabling her to converse. Aulus Gellius tells us that a case of sciatica was cured by gentle modulations, and Theophrastus maintains that the bites of serpents and other venomous reptiles can be relieved by similar means. Ancient physicians, who attributed many diseases to the influence of evil spirits, fancied that harmonious sounds drove them away, more especially when accompanied by incantations; and we find in Luther, "that music is one of the most beautiful and glorious gifts of God, to which Satan is a bitter enemy."