All the teachings of Zen aim to make people understand, awareness and make complete mind. Enlightenment is to reveal the inner nature, that is mind. Zen Buddhism is not interested what causes the mind is defect include defilements, but aim at mind directly. When the mind as a testifier and what mind awareness as thing is known become one. There is no thought process and idea in outlooks a match between the knowledge and thing is know what was happening anymore. In mind attain indeed essence of empty enlightenment without adherence.