‘But he is a bad father.’

Nature did not provide for you a good father, but a father. Your brother wrongs you? Well then, maintain your relationship to him. Do not think about what he is doing, but about what you will have to do if you want to keep your moral character in accordance with nature. For no one can harm you unless you wish it. You will be harmed only when you think you are harmed. If you get into the habit of looking at the relationships implied by ‘neighbour’, ‘citizen’, ‘commander’, you will discover what is proper to expect from each.