Since we are provided with both a body and a mind, we grasp onto the physical forms we see. Since we are provided with both a body and a mind, we cling to the sounds we hear. As a consequence, we make ourselves inseparable from all things, yet we are not like some shadowy figure 'lodging' in a mirror or like the moon in water. Whenever we witness what is on the one side, its opposite side will be in darkness.
DogenIn 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.
Dogen