Everything in this world has its importance. For example dustbin .we see it as a waste thing. But it has its importance. If the dustbin has a scrab then your house is clean. When dustbin is empty then your house is full of scrab.
Just like that a person in the family who gets all the negative energy and make the environment of the family full of happiness. He must be a dustbin but he produces a healthy and progressive environment. A
seed kills itself then it produces a big tree.