When the root of duality – dualistic clinging, dualistic perceptions, deluded perceptions – is severed, all the leaves, the branches, and even the tree trunk of samsara and nirvana naturally wither on their own and topple in their own time. Then this great spreading tree of samsara and nirvana, of duality, of worldliness, of conditioned being, does not need to be chopped down: it is already as if dead. We can relax; done is what had to be done, as the Buddha sang.
This is the whole point of the dharma, of spiritual awakening, of buddhahood; this is its ultimate evolution or unfolding. If we aspire to experience such an awakening, there is nothing else to do except recognize the true nature of our primordial awareness, our own essential being, our own birthright, which is within. This is the intrinsic nature of our own heart-mind, also known as bodhicitta or bodhi-mind. It is our own being, our own nature, this renowned buddha-nature. It is not a buddha anywhere else.