Beyond.

Early youth is a baffling time. The present moment is nice but it does not last. Living in it is like waiting in a junction town for the morning limited; the junction may be interesting but someday you will have to leave it and you do not know where the limited will take you. Sooner or later you must move down an unknown road that leads beyond the range of the imagination, and the only certainty is that the trip has to be made. In this respect early youth is exactly like old age; it is a time of waiting before a big trip to an unknown destination. The chief difference is that youth waits for the morning limited and age waits for the night train.

Bruce Catton, from Waiting for the Morning Train: An American Boyhood