Zazen is seated meditation-the opposite of contemplation-the emptying of the mind of all thoughts in order simply to be. In the midst of all evil, not a thought is aroused in the mind-this is called za. Seeing into one's Self-nature, not being moved at all-this is called Zen.
HuinengGood friends, how then are meditation and wisdom alike? They are like the lamp and the light it gives forth. If there is a lamp there is light; if there is no lamp there is no light. The lamp is the substance of light; the light is the function of the lamp. Thus, although they have two names, in substance they are not two. Meditation and wisdom are also like this.
Huineng