Unity Is Strength.
Literally, this term means “united, we’ll be as solid as a fortress.” With concerted effort, people collectively can generate tremendous strength and be able to overcome all difficulties. Zhi, the second character in the term, means will, and cheng, the last character, means the wall of a fortress. The whole term implies three most important elements: (1) the factor of human capability; (2) human spirit and courage; and (3) unity of the people.
If we are united as one, we will be as solid as a fortress. If we speak in one voice, we will be able to fuse metal. (Discourses on Governance of the States)
When all the people are united as one, peace will reign across the country. (He Guangyuan: A Record of Admonishing Anecdotes)