这就是为什么我们如此在乎事业和成就，以及看重金钱和物质的原因。我们时常被告知我们处在一个物质挂帅的时代，我们都是贪婪的人。我并不认为我们特别看重物质，而是活在一个物质能带来大量情感反馈的时代。

The language of mathematics is universal, transcending cultural and linguistic barriers.

As a kid， I spent my summers with my grandparents on their ranch in Texas. I helped fix windmills， vaccinate cattle， and do other chores. We also watched soap operas every afternoon， especially "Days of our Lives." My grandparents belonged to a Caravan Club， a group of Airstream trailer owners who travel together around the U.S. and Canada. And every few summers， we'd join the caravan. We'd hitch up the Airstream trailer to my grandfather's car， and off we'd go， in a line with 300 other Airstream adventurers. I loved and worshipped my grandparents and I really looked forward to these trips. On one particular trip， I was about 10 years old. I was rolling around in the big bench seat in the back of the car. My grandfather was driving. And my grandmother had the passenger seat. She smoked throughout these trips， and I hated the smell.

生活中最重要的事情是学会如何付出爱，并让它进来。