成功是个糟糕的老师。它让聪明人认为他们不能失败。
Success is a lousy teacher. It seduces smart people into thinking they can't lose.
"When you do something best in life, you don’t really want to give that up – and for me it’s tennis."
我并不痴迷于进球。我痴迷于胜利。
Your most unhappy customers are your greatest source of learning.