Full Idea
If a sculptor says 'I love the statue but I really hate that piece of clay - it is way too hard to work with' ...the statement is partly is partly about that object qua statue and partly about that object qua piece of clay.
Clarification
'qua' means 'understood as'
Gist of Idea
If the statue is loved and the clay hated, that is about the object first qua statue, then qua clay
Source
Michael Jubien (Possibility [2009], 1.4)
Book Reference
Jubien,Michael: 'Possibility' [OUP 2009], p.19
A Reaction
His point is that identity is partly determined by the concept or category under which the thing falls. Plausible. Lots of identity muddles seem to come from our conceptual scheme not being quite up to the job when things change.