Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法：它是关于理解的。
数学不是观赏性运动——你必须参与其中才能欣赏它的美。
When stocks are attractive, you buy them. Sure, they can go lower. I've bought stocks at $12 that went to $2, but then they later went to $30. You just don't know when you can catch the bottom.
我是个幸存者。我不会放弃。我不会停止。我会更加努力。
Death may be the greatest of all human blessings.