Contributed by Michael Brennan / The virtues of some art emerge only when it steps out of its own time. Hilma af Klint’s 2018 retrospective at the Guggenheim is an example. Another is Lou Reed’s album Berlin, released and widely panned in 1973, only to be performed and filmed by Julian Schnabel 35 years later, celebrated by an unforeseen audience, and subsequently considered a canonical masterpiece. Cora Cohen did exhibit her work in the 1980s and has been showing regularly, at a high level, since the 1970s. She’s a well-known, well-regarded painter. But the eight large abstract paintings from the 1980s, now on display at Morgan Presents, haven’t been shown together until now. They are a revelation that couldn’t have fully registered in its own time.