Imagining the future is a kind of nostalgia. (...) You spend your whole life stuck in the labyrinth, thinking about how you'll escape it one day, and how awesome it will be, and imagining that future keeps you going, but you never do it. You just use the future to escape the present.

This quote is saying that sometimes people use their imagination to think of a better future, one where they will have more success or freedom. In doing so, they forget to focus on the present, what they can do now to make their dreams come true. Ultimately, this person is stuck in the same situation, living with the same problems and unable to move forward. The dream of a better future is an escape from the reality of the present, but it can never actually provide true solace or relief.