Allowing your imagination to run in the direction of the way things should be, far away from the way things are, and even more distant from the way things will soon become.

Fantasizing is common and should be seen as healthy. People fantasize about cars, lovers, houses, and many other things. There's nothing wrong with thinking that you may have a chance at something that you will not be able to get. It's a process that everyone goes through every day, this is not to be mistaken for envy, even though they are both closely related.