The music is not in the notes, but in the silence between.

The past explains the present - that is the fundamental premise of evolutionary psychology.

称为颜子，没有不高兴的，虽颜回贫贱短寿。称人为盗跖，没有不发怒的，虽发不义之财且长期寿。

解析：世间万物都是相对而生，相互依存，体现了老子的辩证思想。

解决数学问题的过程往往比解决方案本身更重要。

The key is to set realistic customer expectations, and then not to just meet them, but to exceed them—preferably in unexpected and helpful ways.