"No greater opportunity or obligation can fall the lot of a human being than to be a physician. In the care of the suffering he needs technical skill, scientific knowledge, and human understanding. He who uses these with courage, humility, and wisdom will provide a unique service for his fellow man and will build an enduring edifice of character within himself. The physician should ask of his destiny no more than this. And he should be content with no less."
Dr. Tinsley Randolph Harrison, MD
The full version of the previous one.
Taken from the preface of Harrison’s Textbook of Internal Medicine.