If you worried about falling off the bike, you'd never get on.
如果你担心从自行车上摔下来，你就永远不会骑上去。
When you do something best in life, you don’t really want to give that up – and for me it’s tennis.
In science, the most important quality is intellectual honesty.
不要等待完美的时刻，抓住这一刻并让它变得完美。