The difference between perseverance and obstinacy is that one comes from a strong will, and the other from a strong won’t.

"The past is a foreign country; they do things differently there."

绝不能为了速度或成本而牺牲质量。

最困难的是决定行动，剩下的只是坚持。

意识的元素要根据其属性分类。