Full Idea
Someone can theoretically divide an object into constituent parts, concede that they are one object, and then claim that therefore the one is many and the many are one.
Gist of Idea
If one object is divided into its parts, someone can then say that one are many and many is one
Source
Plato (Philebus [c.354 BCE], 14e)
Book Reference
Plato: 'Philebus', ed/tr. Waterfield,Robin [Penguin 1982], p.57