Psychological concepts must prove their worth in action.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
译文:聪明人注重细节,有智慧的人能发现苗头。
在俄罗斯,法律的严酷性因不被执行而得到缓和。
The scientist is not a person who gives the right answers, he's one who asks the right questions.