Many, knowing how trying are the duties of the physician and how few opportunities physicians have for release from care, even upon the Sabbath, will not choose this for their lifework. But the great enemy is constantly seeking to destroy the workmanship of God's hands, and men of culture and intelligence are called for to combat his cruel power. More of the right kind of men are needed to devote themselves to this profession. Painstaking effort should be made to induce suitable men to qualify themselves for this work. They should be men whose characters are based upon the broad principles of the word of God—men who possess a natural energy, force, and perseverance that will enable them to reach a high standard of excellence. MM 74.3
It is not everyone who can make a successful physician. Many have entered upon the duties of this profession in every way unprepared. They have not the requisite knowledge, neither have they the skill and tact, the carefulness and intelligence, necessary to ensure success. A physician can do much better if he has physical strength. If he is feeble, he cannot endure the wearing labor incident to his calling. A man who has a weak constitution, who is a dyspeptic, or who is lacking in self-control, cannot become qualified to deal with all classes of disease. Great care should be taken not to encourage persons who might be useful in some less responsible position, to study medicine at a great outlay of time and means, when there is no reasonable hope that they will succeed. MM 74.4
I have been instructed that in view of the trying nature of medical missionary work, those who desire to take up this line should first be thoroughly examined by competent physicians to ascertain whether or not they have the strength necessary to endure the course of study through which they must pass in the training school.—Counsels to Parents, Teachers, and Students, 472-473 MM 75.1