glass, water
dimensions vary with installation
signed certificate

Photo: Wang Xiaoxiao
© Vittorio Santoro
Installation view: MoCA Pavilion, Museum of Contemporary Art, Shanghai, Oct. 2015

A glass is placed on the floor in the exhibition room. The guard in a Museum (or the gallerist, an assistant in gallery or a person in a project space) is asked to half fill the glass with water every day deciding whether for him/her the glass is half-empty or half-full.