The free, exploring mind of the individual human is the most valuable thing in the world.
数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
生活中唯一真正的失败是不忠于自己所知道的最好的东西。
El tiempo es el único juez verdadero de la literatura.
The best performance improvement is the transition from the nonworking state to the working state.
The most important thing is to be honest with yourself.