增长的关键不仅在于扩大市场，还在于深化关系。
数学中最深刻的定理往往有最简单的表述。
人通过被某人需要而找到生活的意义。
未来是一个概念——它只存在于我们的脑海中。
Spend as much time crafting the subject line of an email as the message itself because the subject line is often the only thing people read.