Charaka counsels youths who desire to study medicine to “seek a teacher whose precepts are sound and whose practical skill is generally approved, who is clever, dexterous, upright, and blameless; who knows also how to use his hands, has the requisite appliances, and all his senses about him; is confident with simple cases, and sure of his treatment in difficult ones; of genuine learning, unaffected, not morose or passionate, patient and kind to his pupils.” The pupils should spring from a family of doctors, and should have lost none of their limbs and none of their senses. “They are to be taught to be chaste and temperate, to speak the truth, to obey their teacher in all things, and to wear a beard.” They are advised to read medical treatises, attend to the personal instruction of their teacher, and to associate with other doctors. When the doctor visits his patient he should wear good clothes, incline his head, be thoughtful but of firm bearing, and observe all possible respect. Once within the house, word, thought, and attention should be directed to nothing else than the examination of the patient and all that concerns his case. He must not be a boaster. “Many recoil even from a man of skill if he loves to boast.” As medicine is difficult to learn, the doctor must practise carefully and incessantly. He must seek every opportunity for conversation with a colleague. This will remove doubts, if he have them, and fortify his opinion. When an operation is decided on, a fortunate moment, says Dr. Wise, is to be selected, and the Brahmans and the surgeons are to be “propitiated” with gifts. The operating room is to be clean and well lighted, milk, oil, herbs, hot and cold water are to be at hand, and strong attendants to hold the patient. The knife should be wet with water before being used. The sky must be clear, and the time should be near the new moon. The surgeon must be strong and a rapid operator, and he must neither perspire, shake, nor make exclamations. The palms of the hands and soles of the feet, vessels, tendons, joints, and bones are to be avoided. During the operation, care must be taken to keep a fire burning in the patient’s room, on which sweet-scented substances are to be burnt, in order to prevent devils entering the patient by the wound made by the surgeon. After the operation holy water is to be sprinkled on the sufferer, and prayer addressed to Brahma. The bandages are to remain till the third day, and clean ones substituted.[245]