设定目标是将无形变为可见的第一步。
Setting goals is the first step in turning the invisible into the visible.
Where returns are concerned, time is your friend. But where costs are concerned, time is your enemy.
在回报方面，时间是你的朋友。但在成本方面，时间是你的敌人。
When you do something best in life, you don’t really want to give that up – and for me it’s tennis.
万物皆处于流动状态。