"Kappa washes away the dust in his mind"
How will you wash away the dust in your mind?Our mind is filled with desire for worldly things.What is a mind with no dust?
There is a Buddhism term,"Seeing one water from four perspectives".
If a heavenly being looks at water, it is visible as a treasure.
If a man looks at water, it is visible as water.
If a hungry ghost looks at water, it is visible as blood.
If a fish looks at water, it is visible as a dwelling house.
It is a teaching that the view of things changes by people.The mind with no dust sees it as nothing.