What do you mean when a great doctor treats diseases?

All excellent doctors must be single-minded, calm and undisturbed.

According to Sun Simiao's article "Great Doctor Sincerity", it is clearly advocated that doctors must have medical ethics and carry forward the humanitarian spirit of saving lives. Then it discusses two aspects of the cultivation of "great doctor": "essence" and "sincerity" and "essence" refer to professional mastery; "Honesty" means noble moral quality. In other words, a doctor must have excellent medical skills and noble medical ethics.