My father is a stubborn man, and he always keeps what he thinks is right. He is such a strong man in my mind, because he never breaks his promise. The things he has promised to me would be finished, no matter what happens. I see the power of promise from my father, so I believe that keeping promise is very important, which shows whether the person is worthy to be trusted or not. When I make friends, I pay special attention to this merit. My friends and I trust each other. We will return the things in time and keep our promise. I am so lucky that my father brings so much postive sides to me.