Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.
学习是系统中产生的任何变化，这些变化或多或少会永久性地改变其适应环境的能力。
一位哥伦比亚大学的学生问到巴菲特关于投资美国航空的原因，他说
"Survival is not just about staying alive; it’s about holding on to your humanity."
在每个故事中，都有作者的一片心，他们灵魂的一角裸露给世界看。
"Silence can be louder than words, if you know how to listen."
The pursuit of mathematical truth is a deeply personal and profoundly universal endeavor.