在快速变化的世界中，适应性至关重要。

And that's a lot of the reason why we care so much about our careers and indeed start caring so much about material goods. You know, we're often told that we live in very materialistic times, that we're all greedy people. I don't think we are particularly materialistic. I think we live in a society which has simply pegged certain emotional rewards to the acquisition of material goods. It's not the material goods we want;

世界只给予我一次，不是存在一个又感知一个。

Profit that depletes the planet is no profit at all.