Interesting that people continue to say that there are 8 dusts that we have to remove to purify our minds. In the Ofudesaki, there are only 5 dusts that are mentioned.
Kono michi wa oshii hoshii to kawaii to
Yoku to koman kore ga hokori ya 3-97
These paths are regret, covetousness, self-love,
greed, and arrogance. These are the dusts. 3-97
Some may say that it does not matter if there are 5 or 8, as dust is dust. But I believe that the three that are not mentioned in the Ofudesaki are not dusts, but arise from the 5 dusts, especially the dust of arrogance. Anger is an emotion derived mostly from arrogance. Hate originates from anger, while grudge bearing also is an action taken because anger exist.
God tells us when inconveniences or obstacles appear in our lives, we should calm our minds to ponder the dusts in our minds. The problem arises when we ponder anger, hate, grudge bearing , we are not going back to the origin of these emotions and actions. If we do not remove the source which I believe comes from the dust of arrogance, we will not be successful in eliminating these emotions and actions that cause others to suffer. Remember we must go back to the origin!
Heaven's Truths, in Healing the Body 