The sky is pure, open space, free from all obstructions. The nature of our mind is similar: the afflictions, self-centered attitude, and other obscurations are not in its essential nature. Just as clouds may temporarily obscure the open sky, anger, attachment, and confusion can temporarily obscure our mind. When they do, the pure, open nature of the mind still remains; we just can’t see it at the time.
By generating the wisdom realizing the emptiness of inherent existence, we will be able to eradicate obscurations from our mind forever and enjoy the sky-like spaciousness of a purified mind.