Often, one finds oneself missing–pendululating over–what would have, could have, should have been–the what-if –the maybe– the perhaps.
To miss a barely-remembered someone or something or instance is to grant the imagination infinite space to play–run wild–exasperate.
An absence–a lack of matter that should have been there–is devastating. William Faulkner called it a [ ]. That’s probably the most accurate description of all.