"I stick to the ground and walk" can be understood as being calm and pragmatic about career and life, one step at a time.

"Dancing in the clouds" can be understood as being impetuous and careless about career and life, illusory and without any support. The two clauses are connected together to show the philosopher's point of view: he approves of the steady and pragmatic pursuit of life and despises impetuous and rash life choices. Therefore, the following ideas can be recommended: First, a calm and pragmatic life is the most beautiful. Secondly, the ethereal “dance” is the most terrifying. Third, if you are not down-to-earth, how can you succeed in life? Fourth, pursuing "emptiness" is doomed to lead an empty life.