Primum non nocerum. (First do no harm)

Where there is love of medicine, there is love of humankind.

Into whatsoever houses I enter, I will enter to help the sick, and I will abstain from all intentional wrong-doing and harm, especially from abusing the bodies of man or woman, bond or free. And whatsoever I shall see or hear in the course of my profession, as well as outside my profession in my intercourse with men, if it be what should not be published abroad, I will never divulge, holding such things to be holy secrets.

I swear... to hold my teacher in this art equal to my own parents; to make him partner in my livelihood; when he is in need of money to share mine with him; to consider his family as my own brothers and to teach them this art, if they want to learn it, without fee or indenture.

Life is short, science is long; opportunity is elusive, experiment is dangerous, judgement is difficult.

Sometimes give your services for nothing.

We must turn to nature itself, to the observations of the body in health and in disease to learn the truth.