When defilement comes to the mind, it is so important not to judge it as bad, but to see it as mind and the nature of mind so that you would want to watch it. Right view must come in.
What we’re doing is judging – we say ‘Oh, this is bad!’, but when we judge, it doesn’t go away. If we accept it as this is the mind, we change our view to right view and we watch it. We watch everything this mind does, like jealousy – we watch how it feels and what it does until the mind understands ‘Oh, this is bad!’ When the mind understands, it will go away by itself. Thatis understanding.
When we judge it, it doesn’t go away; but when we realize it, it goes away.
To come to the true realization that this is bad, you have to live with it and stay close to it to understand that it’s truly bad.
So, at first, you cannot judge it as bad because understanding it is bad and judging that it is bad is actually the difference between wisdom and defilement; judging is another defilement.