Directions: The short passage below is followed by a question based on its content. Answer the question on the basis of what is stated or implied in the passage.
The Chinese also speak of a great thing (the greatest thing) called the Tao. It is the reality beyond all predicates, the abyss that was before the Creator Himself. It is Nature, it is the way, the road. It is the way in which the universe goes on, the way in which things everlastingly emerge, stilly and tranquilly, into space and time. It is also the way which every man should tread in imitation of that cosmic and supercosmic progression, conforming all activities to that great exemplar. 'In ritual,' say the Analects, 'it is harmony with Nature that is prized'. The ancient Jews likewise praise the law as being 'true.'
What is the theme of the passage?