Oristar wrote:We first choose, then maintain, after all.
No, not after all.
Look, The Metropolitan Museum of Art, in New York, owns vast collections of art items, numbering many times what it exhibits.
Do you think they maintain only what they exhibit/choose for exhibition?
They maintain all they own and curate according to their interests and/or needs.
Quote:verb
past tense: curated; past participle: curated
1.
select, organize, and look after the items in (a collection or exhibition).
"both exhibitions are curated by the museum's director"