数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
The world is full of people who have never, since childhood, met an open doorway with an open heart.
你可以非常爱一个人……但你永远无法像想念他们那样爱他们。
It's on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.