What did Miss Maudie mean when she said," There are just some kind of men so busy worrying about the next world they've never learned to live in this one..."?

This quote is talking about how people think about other people's lives aswell as the future so much that they take their own lives and the present for granted, never stopping to appreciate what they themselves have or ever thinking about what they say. people will say things about one persons life but then never take their own words and apply to what they said.