Sustainability is not a destination, but a journey that requires continuous improvement and innovation.

Never think that war, no matter how necessary, nor how justified, is not a crime.

人一生不学习，一天闲过，一事无成，这是人生三件可惜事。

The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.

Flow is being completely involved in an activity for its own sake. The ego falls away. Time flies. Every action, movement, and thought follows inevitably from the previous one, like playing jazz. Your whole being is involved, and you're using your skills to the utmost.