He was in a dreamy daze, his head and body were humming, he was very relaxed, and he didn't want to move. The blurted announcement of his station broke him out of his reverie, and automatically he jumped up and darted off the train onto the platform before the doors slammed shut. As soon as the doors slammed shut, and the train jerked and started to move off, he realized he"d forgotten his bag. He walked quickly along the platform straining his eyes through the window to catch a glimpse of his bag, and was shocked to see himself still sitting on the train, with his head down, evidently still engrossed in the novel that he had been reading several minutes ago. He stopped, and stared after the train, watching the back of his head get more obscure so that he couldn't make it out - maybe he turned to look out of the window, thinking that something might be wrong, suddenly worried that he"d forgotten his bag - but he wouldn't have seen it if he did. And, in any case, he had his bag with him, safely stowed between his feet, out of danger of trampling feet, out of reach of the dirty, dark-skinned, quick-footed, thieving gypsy children. Perhaps it wasn't his bag anymore after all. But why did he suddenly realize he"d forgotten it, if it wasn't his to forget? Perhaps the delay in remembering his bag, and the initial forgetfulness that made him leave it behind in the first place, was the first symptom in his becoming detached from his other, previous self. He had been himself for so long that of course the two people, though now separate, are exactly the same, because they had been, until now, the same person. But from the moment they split, like an egg splitting into twins, though admittedly a little late, they started to become different people, and the old self is left behind to continue his life, not knowing of the existence of his twin, who is already starting to become profoundly estranged from him, while his twin must try to find his way in this new situation, try to come to terms with the fact that he is no longer quite himself.
