The only freedom which deserves the name is that of pursuing our own good in our own way， so long as we do not attempt to deprive others of theirs， or impede their efforts to obtain it.

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

经济学方法为理解所有人类行为提供了一个有价值的统一框架。