The secret of being miserable is to have leisure to bother about whether you are happy or not.
The power of mathematics is in its universality and its ability to transcend cultural boundaries.
广泛地学习,专心致志,恳切地求教,多思考当前的实际问题,仁德就在其中了。
历史的塑造现在超过了人们根据珍视的价值观来定位自己的能力。哪些价值观?即使没有恐慌,人们也常常感觉到旧的感觉和思维方式已经崩溃,而新的开始模糊到道德停滞的地步。