If everything was perfect, you would never learn and you would never grow.

采石场中的每一个挑战都是创新的机会。

The only freedom which deserves the name is that of pursuing our own good in our way， so long as we do not attempt to deprive others of theirs or impede their efforts to obtain it.

一个组织的流程质量决定了其产品和服务的质量。

顾客忠诚是赢得的，不是买来的。