What can be indissoluble if a perpetual Union, made more perfect, is not?

What can be indissoluble if a perpetual Union, made more perfect, is not?

如果一个永久的结合变得更加完美，而不是不可分割，那么还有什么是不可分割的呢?

-- Salmon P Chase 萨蒙P蔡斯