People work better when they know what the goal is and why.It is important that people look forward to coming to work in the morning and enjoy working.

I have no ideas about what the paintings imply about the world. I think it's better if I don't know.

Language is not just a system of symbols， but a set of practices with social and cultural significance.

国家是理性的行为体，它们寻求最大化相对权力，以确保在竞争性的国际体系中生存。