Principles

Some people treat the others like chocolate. This is a funny game. The rules are: open it, taste it, eat it, throw away the wrapping. The chocolate itself is the role you want this person to play in your life. When you've devoured the chocolate and the person has been used by you, you can throw away the rest - you don't need anything except the chocolate itself. So the person is being thrown away.
I used to play this thing some time ago, till I got a never-ending multi-taste bar of chocolate. ^_^

There is also a 'bus principle'. When going somewhere by bus, have you ever understood that this vehicle is a closed system? And it has its own rules, too. You can remain in the bus if only:
- the bus isn't broken,
- you pay the fare,
- your route is similar to the route of the bus,
- you're not eating ice-cream or anything,
and so on.
If you violate one of the rules, you are risking to be:
- thrown out of the bus (out of the system),
- turned in to the police situated outside the system.
And so is the whole life. Something is giving us rules and watching us outside.