answer: A mom teaches her son how to swim starting with how to breathe in and breathe out. The son loses faith at first but then realizes everything is possible with a willing heart.
documents: #Person1#: Hurry up! Mom, I can't wait any more.
  #Person2#: Look out, honey. Let's come to the shoal waters. Follow me!
  #Person1#: OK, Mom. Can I swim now? I want to learn butterfly stroke.
  #Person2#: Honey, listen to me. First, you should learn how to breathe in and breathe out.
  #Person1#: Mom, it's so terrible. Water went down into my throat and I almost got drowned.
  #Person2#: Do be patient, Honey. Let's do it slowly and correctly.
  #Person1#: Oh, Mom, I think I'm not the right person for swimming.
  #Person2#: Come on, sweetie, you've done very well. It is the first step that is tough.
  #Person1#: Right, I'll make up my mind. Please correct me if any of my movements go wrong.
  #Person2#: Yes, well done. That's the way to go. How clever you are! You've got it.
  #Person1#: Really? I can't believe it. Everything is possible to a willing heart.
  #Person2#: Exactly, next, you should hold your legs together and extend your arms above your head.
  #Person1#: Yes, like a dolphin. Am I on the right track?
  #Person2#: That's the way to go. Now, you are flying, my boy.