Don't let anyone tell you that you can't do something

Quality is free. It's not a gift, but it's free. What costs money are the unquality things -- all the actions that involve not doing jobs right the first time.

Sustainability is not just a trend, it's a responsibility we owe to future generations.

 知识就是力量。

唯一真正重要的是你在世界上产生的影响。