To remind us exactly about what doesn't coexist with our person.
There is none.
Hate serves no purpose except to burn the hater up from the inside. It a very destructive emotion
To let you know there is no worse feeling in the world and that we all need to contain our emotions or it will end the world.
If you don't know how to use it properly give it to me. Ugh. Amateurs... Kidding lol. >_>
Making things difficult. Or as I've been thinking lately, it's probably another "instict" we got to avoid death... someway.
there is no purpose