I personally like to think he is forever doomed to construct new ways of perceiving his life, that are all efforts to avoid a traumatic event, e.g. his wife's murder. But the wider point of such a narrative is to engage us in questioning to what extent we contruct our own lives in terms of hiding from unresolved problems/fears. In what ways are we similar to Lenny? Do we believe what we tell ourselves? How reliable and/or valid is memory? Does time really heal (the movie seems to say, not if you have no sense of the passage of relavent time).