Be sympathetic with the other person's ideas and desires.
A barber lathers a man before he shaves him.
Names are the sweetest and most important sound in any language.
When fate hands you a lemon, make lemonade.
An argument would have begun to steam and boil and sputter - and you know how arguments end. Even if I had convinced him that he was wrong, his pride would have made it difficult for him to back down and give in.
Check up each week on the progress you are making. Ask yourself what mistakes you have made, what improvement, what lessons you have learned for the future.