数学不仅仅是一种工具;它是一种思维方式。
Mathematics is not just a tool; it is a way of thinking.
人需要困扰,困扰是心理健康的必需之物。
"The most ordinary lives can contain extraordinary stories."
If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.
心理学的方法必须像自然科学一样精确。