People normally cut reality into compartments, and so are unable to see the interdependence of all phenomena. To see one in all and all in one is to break through the great barrier which narrows one's perception of reality, a barrier which Buddhism calls the attachment to the false view of self.Attachment to the false view of self means belief in the presence of unchanging entities which exist on their own.
Thich Nhat Hanh, The Miracle of Mindfulness: An Introduction to the Practice of Meditation
mindfulness