In his essay The Texture of Time (1924) Van Veen (the narrator and main character in VN's novel Ada, 1969) refuses to grant the future the status of Time:
Here a heckler asked, with the arrogant air of one wanting to see a gentleman’s driving license, how did the ‘Prof’ reconcile his refusal to grant the future the status of Time with the fact that it, the future, could hardly be considered nonexistent, since ‘it possessed at least one future, I mean, feature, involving such an important idea as that of absolute necessity.’