What is evil good for?
It was not created, so it’s not a thing; it’s a corruption of what was created. A stained white is not really white anymore, so there is no good in a stain, as one should always prefer not to have it.
Some will argue that void is good because without void we could not comprehend space, but I would like to remind them that void is just nothing, and virtue cannot be attached to nothing.
One would also say that evil is the opposite of good in order to understand the duality of moral principle, then choose the good part. I argue that one needs this distinction because he has it inside him and uses a materialistic comprehension of the world.
One needs to see the devil outside in order to see the devil inside oneself.
A materialistic comprehension excludes the metacognition and transcendental awareness that can only be by the heart.
Once you see the world as one, there is no more good and evil, and in this regard evil has no meaning.
Only a decadent spirit needs the feces to be aware of the spirit of the roses.
Vajrayana highlights that virtues like responsibility, diligence, honor, and loyalty are not just moralistic "oughts" but practical necessities for navigating the path of "non-duality" without falling into confusion or arrogance.
View Like the Sky, Conduct Like Flour": Guru Rinpoche taught that while one's view of reality should be as expansive as the sky (non-dual, empty), one's conduct in daily life should be as meticulous as separating fine flour from dirt, carefully distinguishing between good and evil, and adhering to karmic cause and effect.