Each living creature is said to be alive and to be the same individual - as for example someone is said to be the same person from when he is a child until he comes to be an old man. And yet, if he's called the same, that's despite the fact that he's never made up from the same things, but is always being renewed, and losing what he had before, whether it's hair, or flesh, or bones, or blood, in fact the whole body.

A man who is good for anything ought not to calculate the chance of living or dying; he ought only to consider whether in doing anything he is doing right or wrong - acting the part of a good man or of a bad.

Is it not also true that no physician, in so far as he is a physician, considers or enjoins what is for the physician's interest, but that all seek the good of their patients? For we have agreed that a physician strictly so called, is a ruler of bodies, and not a maker of money, have we not?

Man is a two-legged animal without feathers.

To conquer oneself is the best and noblest victory; to be vanquished by one's own nature is the worst and most ignoble defeat.

Lack of activity destroys the good condition of every human being

It is proper for every one to consider, in the case of all men, that he who has not been a servant cannot become a praiseworthy master; and it is meet that we should plume ourselves rather on acting the part of a servant properly than that of the master, first, towards the laws, (for in this way we are servants of the gods), and next, towards our elders.