In doing zazen it is desirable to have a quiet room. You should be temperate in eating and drinking, forsaking all delusive relationships. Setting everything aside, think of neither good nor evil, right nor wrong. Thus having stopped the various functions of your mind, five up even the idea of becoming a Buddha.
Learn the backward step that turns your light inward to illuminate your self. Body and mind of themselves will drop away, and your original face will be manifest.
Just practice good, do good for others, without thinking of making yourself known so that you may gain reward. Really bring benefit to others, gaining nothing for yourself. This is the primary requisite for breaking free of attachments to the Self.
