The customer may not always be right, but they are always the customer.

For every dollar you spend purchasing something substantial， expect to pay a dollar in repairs， maintenance， or disposal by the end of its life.

数学是人类精神最美丽、最强大的创造。

书会说：她这么做是因为。生活说：她这么做了。书是向你解释事情的地方；生活是事情没有解释的地方。

当不同的声音被倾听和重视时，才能做出最好的决策。