The Fundamentals of (Ch'an) Meditation Practice by Ting Chen. Originally, one's own mind and nature are pure, and there is nothing to accept and nothing to refuse; there is neither existence nor nonexistence; there is only clear understanding without attachment and with no dwelling. One who wants to know the no-attachment, no-dwelling mind can find it through meditation, because it is only then that the mind does not think of right and wrong, of good and evil or of self and others.