Physicians of the heart

No one presumes to teach an art that he has not first mastered through study. How foolish it is therefore for the inexperienced to assume pastoral authority when the care of souls is the art of arts. For who does not realize that the afflictions of the mind are more hidden than internal wounds in the body? And yet, how often do they who are completely ignorant of spiritual precepts profess themselves physicians of the heart, while anyone who is ignorant of the power of medicine is too embarrassed to be seen as a physician of the body.

– from Book of Pastoral Rule, c. 590 by Pope St. Gregory I