Natural desires are limited; those which spring from false opinions have nowhere to stop, for falsity has no point of termination.

When a person is following a track, there is an eventual end to it somewhere, but with wandering at large there is no limit. So give up pointless, empty journeys.

Whenever you want to know whether the desire aroused in you by something you are pursuing is natural or quite unseeing, ask yourself whether it is capable of coming to rest at any point; if after going a long way there is always something remaining farther away, be sure it is not something natural.