Galen

The physician must be a man of good character, and he must be learned in all branches of knowledge.

The art of medicine is the art of preserving health and curing disease.

The pulse is the messenger of the heart.

The humors are the primary constituents of the body.

Exercise is the best medicine.

Diet is the foundation of health.

Sleep is the restorer of the body.

The physician must be able to adapt his treatment to the individual patient.

The physician must be a careful observer.

The physician must be a skilled anatomist.

The physician must be a skilled surgeon.

The physician must be a skilled pharmacist.

The physician must be a skilled diagnostician.

The physician must be a skilled prognostician.

The physician must be a skilled therapist.

The physician must be a skilled teacher.

The physician must be a skilled researcher.

The physician must be a skilled writer.

The physician must be a skilled debater.

The physician must be a skilled logician.