经常看到一句俗语“分久必合，合久必分”，言简意赅，自己想不出合适的翻译，请问英语中有没有该句的对译或者类似的表达？

——Ye Qiunai

以下译法，可任选一种:

The world will become united after a long period of separation.

或者Long divided, the world will unite; long united, it will fall apart.

或者Unification and separation complement each other.