你必须相信自己，即使没有其他人相信你。

"The role of business is to produce goods and services that people value more highly than their cost, and to do so while consuming as few resources as possible."

每个物品都有声音，如果你知道如何倾听。

怀疑并不是令人愉快的状态，但确信是荒谬的。