“In tennis who is it that provides a person with the obstacles he needs in order to experience his highest limits? His opponent, of course! Then is your opponent a friend or an enemy? He is a friend to the extent that he does his best to make things difficult for you. Only by playing the role of your enemy does he become your true friend. Only by competing with you does he in fact cooperate! No one wants to stand around on the court waiting for the big wave. In this use of competition it is the duty of your opponent to create the greatest possible difficulties for you, just as it is yours to try to create obstacles for him. Only by doing this do you give each other the opportunity to find out to what heights each can rise.”