Change is hardest at the beginning, messiest in the middle, and best at the end.
变革在开始时最难,在中间最混乱,在结束时最好。
数学不仅仅是关于数字、方程、计算或算法,而是关于理解。
The best way to predict the future is to create it.
Tennis is a mental game. Everyone is fit, everyone hits great forehands and backhands – it’s the upstairs that counts.