A physician's cold or indifferent manner can harm a patient and counteract the effectiveness of medical remedies.

Original passage

Sympathy and tact will often prove a greater benefit to the sick than will the most skillful treatment given in a cold, indifferent way. When a physician comes to the sickbed with a listless, careless manner, looks at the afflicted one with little concern, by word or action giving the impression that the case is not one requiring much attention, and then leaves the patient to his own reflections, he has done that patient positive harm. The doubt and discouragement produced by his indifference will often counteract the good effect of the remedies he may prescribe.