You shouldn't eat things that aren't meant to be eaten.
Samuel is hiking along a mountain trail when he suddenly feels hungry.
He wants to eat something.
Samuel reaches into his backpack and pulls out some trail mix to eat.
Samuel picks some berries from a nearby tree to eat even though he doesn't know anything about them.
Samuel satisfies his hunger with the trail mix and continues on his hike.
Samuel gets a terrible stomachache and is sick for three days when it turns out the berries are poisonous.