We are, to all intents and purposes, our minds. They, more than anything else, define the kind of person we are. Yet, as Barack Obama recently observed while launching a 100-million-dollar brain intiative, our inner spaces are also almost impenetrable. Fantastic progress has been made, using techniques like MRI scans to analyze the working brain. 

译文：

我们说到底就是我们的思想意志。是它们定义了我们是什么类型的人，比别的因素作用都大。不过，正如巴拉克·奥巴马在近期启动一项耗资一亿美元的大脑研究创举时所留意到的，我们的内心世界几乎无法理解。利用诸如核磁共振成像这样的技术对运作中的人脑进行分析，获得了难以想象的成就。