What details indicate that Dexter from Winter Dreams is an ambitious young man?

A successful businessman and the storyâ??s protagonist. Dexter grew up in Keeble, a small Minnesota village, the son of a grocer and Bohemian mother. Ambitious and eager, he works hard to gain the trappings of wealth and status. Dexter both celebrates and denies his humble working-class origins. He feels like a trespasser in the halls of the affluent, but at the same time he feels superior for having worked his way into the upper ranks, a group comprising people for whom he has little respect for.