What an apt metaphor. Down-to-earth, practical and calm, seeking truth from facts; Standing in the clouds, it is easy to be impetuous, rash and too idealistic. The so-called walking, step by step, solid and steady; If you dance in the clouds, you will dance freely. Walking on the ground and jumping in the clouds are actually two attitudes towards life. The former is pragmatic and diligent, while the latter is reckless. In life, the latter is more than the former, which is caused by inertia. As we all know, although the former is bitter, it is not as glamorous as the latter, but it is really needed for a successful life.