A philosophical problem has the form: "I don't know my way about."
对知识的投资总是能带来最大的利益。学习是好学的人,财富是细心的人。如果一个人把钱包倒进他的头里,没有人能把它从他身边夺走。
数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
It is much easier to change how you think by changing your behavior, than it is to change your behavior by changing how you think. Act out the change you seek.