Just as it is no use trying to get a person to see what he does not wish to see, so is it useless to persuade a person to hear what he does not wish to hear.
Mr Harris strode down to the bottom of the garden, where his son was busy doing nothing among the bushes.
‘Why don’t you come in when I call you?’ he demanded.
‘I’m sorry, Dad, but I didn’t hear you. ‘
‘None so deaf as those who won’t hear. Get back indoors and do your homework.’