A physician without a knowledge of Astrology has no right to call himself a physician.

He who wishes to be a surgeon should go to war.

A sensible man ought to think about that well being is the best of human blessings, and find out how by his personal thought to derive profit from his sicknesses.

Science is the father of knowledge, but opinion breeds ignorance.

All excesses are inimical to Nature. It is safer to proceed a little at a time, especially when changing from one regimen to another.

Idleness and lack of occupation tend - nay are dragged - towards evil.

Correct is to recognize what diseases are and whence they come; which are long and which are short; which are mortal and which are not; which are in the process of changing into others; which are increasing and which are diminishing; which are major and which are minor; to treat the diseases that can be treated, but to recognize the ones that cannot be, and to know why they cannot be; by treating patients with the former, to give them the benefit of treatment as far as it is possible.