Why is there so much greed, folly, and violence in the world? The Zen answer is that because our bifurcating intellect and our five senses deceive us into postulating the dualism of self and other, we are led to think and act as though each of us were a separate entity confronted by a world external to us.

Philip Kapleau, Awakening to Zen by Polly Young-Eisendrath, editor, Rafe Martin, editor