The Lankavatara Sutra tells us that only the Mind is real, and that the visible world that we see is just a manifestation of that underlying Mind. This perspective is similar to the Consciousness-Only and Hua-yan schools.
Contrary to the true Mind, people in everyday situations mistakenly try to differentiate between dharma and no-dharma (thinking that some things are pure and desirable while other things are not).
In making that distinction, they wrongly imagine that enlightenment is something distinct from everyday reality, when according to Zen teaching enlightenment is actually to be found within this ordinary world