Pleasures unaccompanied by pain, on the other hand—and these are those derived from things naturally and not accidentally pleasant—do not admit of excess. By things accidentally pleasant I mean things taken as restoratives; really their restorative effect is produced by the operationIt is this which is really pleasant: see 12.2. of that part of the system which has remained sound, and hence the remedy itself is thought to be pleasant. Those things on the contrary are naturally pleasant which stimulate the activity of a given nature.i.e., which stimulate the activity of any ἕξις, disposition or faculty, which is in its natural state, in contrast with those pleasures which stimulate the restoration of a faculty to its natural state.