From Thich Nhat Hanh’s Four Establishments of Mindfulness: If the rose is on its way to becoming garbage, then the garbage is also on its way to becoming a rose. She who observes discerningly will see the nondual character of the rose and the garbage. She will be able to see that there is garbage in the rose and that there are roses in the garbage. She will know that the rose needs the garbage for its existence, and the garbage needs the rose, because it is the rose that becomes garbage. Therefore, she will know how to accept the garbage in order to transform it into roses and will not be afraid when she sees the rose wither and turn into garbage. This is the principle of nonduality. If true mind (the rose) can be discovered in the raw material of deluded mind (the garbage), then we can also recognize true mind in the very substance of illusion, in the substance of birth and death.