Let me tell you again that you must be pure and help anyone who comes to you, as much as lies in your power. And this is good Karma. By the power of this, the heart becomes pure (chittashuddhi), and then Shiva who is residing in every one will become manifest. He is always in the heart of everyone.
If there is dirt and dust on a mirror, we cannot see our image. So ignorance and wickedness are the dirt and dust that are on the mirror of our hearts.
Selfishness is the chief sin, thinking of ourselves first. He who thinks, ‘I will eat first, I will have more money than others, and I will possess everything’, he who thinks, ‘I will get to heaven before others; I will get mukti before others’ is the selfish man. The unselfish man says, ‘I will be last, I do not care to go to heaven, I will even go to hell if by doing so I can help my brothers.’