The only good is knowledge and the only evil is ignorance.

家中闲坐无聊，不妨想想，有人在为生活而辛劳；官位不能飞黄腾达，想想仍有许多才能好的读书人，人都老了还是青衣。

"We are what we repeatedly do. Excellence, then, is not an act but a habit."

Every piece of plastic we produce should have a clear path to being reused or recycled.