There is no stress in the world, only people thinking stressful thoughts.
富贵不能使我的思想迷乱，贫贱不能使我改变志向，威武不能使我节操屈服，这样的人才称得上大丈夫。
忠于自己，永远不要让别人说的话分散你对目标的注意力。
We don't even know how strong we are until we are forced to bring that hidden strength forward. In times of tragedy, of war, of necessity, people do amazing things. The human capacity for survival and renewal is awesome.
The more acute the experience, the less articulate its expression.
When you do something best in life, you don’t really want to give that up – and for me it’s tennis.