You know, in the Middle Ages, in England, when you met a very poor person, that person would be described as an "unfortunate" -- literally, somebody who had not been blessed by fortune, an unfortunate.
数学的美在于它让我们看到世界上不立即显现的模式和结构。
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
问题不是如何被治愈,而是如何生活。
The study of attention provides a window into how the brain selects, integrates, and acts upon information.