To do great things is difficult，but to command great things is more difficult.

I'm not a perfectionist, but I like to feel that things are done well.

The past is a mirror in which we see ourselves reflected.

Pride relates more to our opinion of ourselves, vanity to what we would have others think of us.

大脑是一个复杂而动态的系统，理解它需要多学科的方法。

Certification programs are more than stickers on wood products; they represent a promise to our planet.