The poor face constraints that are often invisible to policymakers.
研究心灵就是研究适应行为；每个思想都是生活的工具。
音乐是灵魂的语言，它能以言语无法企及的方式触动人心。
The beauty of literature is that it allows us to live multiple lives, to experience different worlds, to feel the emotions of others.
The power of abstraction allows us to see the common threads that run through seemingly disparate problems.