Of such things some are not peculiar to health or even to life, but common to speak broadly to all dispositions and actions, eg without breathing or being awake or having the power of movement we could enjoy neither good nor evil; but some are peculiar to each kind of thing, and these it is specially important to observe; eg the eating of meat and walking after meals are more peculiarly the indispensable conditions of a good physical state than the more general conditions mentioned above.