This concept describes that objects frequently in motion are not affected by external factors, and can last a long time. It also means that movement sustains life and vigor. In modern days, it means that existing thought and ideas must be continuously reviewed and critiqued, and that there must be criticism and self-examination to avoid becoming conservative and inflexible. This is the way to ensure continuing change and progress. The philosophical implication is that motion is the foundation of the world and the source of vitality of all things.

Running water never turns foul, and moving hinges attract no worms, all thanks to continuous motion. This also applies to the human mind and body. (Master Lü’s Spring and Autumn Annals)