The only way to actually abandon or eradicate the kleshas is to see their nature. Therefore, in order to abandon the kleshas, we must cultivate the prajna or discernment which is able to see the nature of those kleshas. If their nature is seen, they will disappear by themselves without having to be chased away or destroyed by any other means.
So in order to cultivate this prajna, the Buddha taught emptiness. He taught that there is no truly existent person who generates kleshas, that there is no truly existent object that stimulates kleshas, that the kleshas themselves have no solid or substantial existence, and so forth. He taught that what we experience exists as relative truth, but that the emptiness of what we experience is absolute truth.
source: SHENPEN ÖSEL, Volume 6
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