Full Idea
It is hard to believe that any philosopher means it when they say the future is unreal. If anyone is right that there is no future, that moment is their last, and it is the end of everything.
Gist of Idea
It is quite implausible that the future is unreal, as that would terminate everything
Source
David Lewis (On the Plurality of Worlds [1986], 4.2)
Book Reference
Lewis,David: 'On the Plurality of Worlds' [Blackwell 2001], p.207
A Reaction
A bit simplistic. I might say 'there will be a future time, but it doesn't exist now'. That's the peculiar thing about time. If I say New York doesn't exist, then clearly I can't visit it. The London 2012 Olympic Stadium is going to exist.