From the Confidence of the Mind Inscription
For reality to manifest here and now, do not distinguish between good and bad. To discriminate in this way is a disease of the mind, which obscures the realisation of the mysterious knowledge, and renders the practice of quiet study futile.
Discrimination represents the labels we put on things. We label things as 'good' or 'bad', we look upon things with greed and aversion, but these are just meanings we are attaching to things, meanings that are not inherently present.
It's important to recognize greed and delusion because they are two of the three poisons. They are things that do a lot to harm our efforts on the path.
We shape our reality with labels. Nothing is good or bad, everything just is. As long as we cling to these labels that we are creating, we are feeding a disease of the mind.
Greed and aversion inspire and support delusion. As long as we are suffering from the three poisons, understanding our true nature will remain beyond our reach.