It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.
数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
 知识就是力量。
A business has to be involving, it has to be fun, and it has to exercise your creative instincts.
The past is a resource that can be used in the present.