知识的每一次进步都会带来新的问题和新的困难。
孩子得到的第一个想法是最重要的。
An artist’s job is to make the invisible visible.
我不让错误让我灰心，我让它们教育我。
人生是不断选择的过程。
The most important political development of the last two centuries has been the rise of the modern state.
We've learned that change is necessary for growth.