The Karmic system:

There is a balance. With every positive there is a negative. With every new ability, or strength, you gain a new disadvantage. The means to become strong, is through using many abilities, covering each one of your weaknesses. But, covering yourself from all angles opens up another weakness- you enclose yourself in a shell, leaving yourself for an attack from below, or to rot from the inside.

Every weakness there is a strength and every positive there is a negative. Be it mental, physical, or a societal- there are faults, and strengths. They balance each other. Without them there would be no emotions.

Realism, or reality, is bandaged from weakness. Without pain, or grievances, these characters we create are simply pieces of our mind(s)- nothing more, nothing less. If they are all strong, willing to die, and always fighting for what is determined right by a outside force- they''re not representations of reality. What generates reality is indecision, or mistakes, from our own psyches.

Humans are not perfect yet we attempt to create a perfect world with a made up world, which we call a roleplay. The world is not perfect, and will never be. We can day dream, or even attempt to create it- but in the end it''s impossible. In a world with only strengths, there is zero weaknesses. Without weaknesses no one would ever need protection, or assistance. We would be perfect. Then, we would separate from each other, breaking society from within, creating a new weakness within each other and within ourselves. Who needs each other, when you can sustain yourself easily without much effort, since your perfect?

Therefore you need weakness to bind people together. With each weakness, there is strength that you gain from it. If your weak, you seek other weak people to gather your strength, and take down a stronger force. Think of many ants taking down an arachnid- with one ant, he may succeed, but he will probably be destroyed with a quick stomp of the spider's frontal legs or by the quick slam of the rear end. With strength in numbers, though, you rush in and defeat your opponent- not needing for other people for anything.

You NEED weakness, so you can be strong. No one will ever be perfect. If someone some how become a perfect entity, they have left the land of the living, and lost their main weakness: Mortality.