Om Swami
How do I know what is right and wrong when it is not always clear?
Right and wrong are not black and white
The notion of what is right and what is wrong can never be marked in black and white, and that is the very basis of the whole Mahabharata. Understanding, not just knowledge, tells you what you have to do.
In knowledge, you know what you can do, all that you are able to do. In understanding, you know what you have to do.