This is the crucial question in the short story. Throughout the short story, Dade lived his life between his father and mother. His father was a practical man who planned out his life, and he wanted Dade to do the same. Dade's mother was a dreamer, and she wanted Dade to dream and do something great.
As one can imagine, Dade was torn between the desires and aspirations of his mom and dad. At one point, it seemed that he would take his father's path. He started taking working at the store more seriously. In fact, he was going to capture a shoplifter. He actually does. But after a while, he lets her go. Oddly, he even begins to walk with her for some time, and the story ends.
The point of the story is that Dade is still in the middle. He is as lost as ever. So, he just wanders. If he has learned anything it is that he cannot live for his mom or dad. He has to find his own way, which he has yet to do.