A youth is to be regarded with respect. How do we know that his future will not be equal to our present? If he reach the age of forty or fifty, and has not made himself heard of, then indeed he will not be worth being regarded with respect.
Every one of course represents the spirit of his age, but there is an eternal aspect of the Spirit of every age which may be caught. To recreate the past from the mutilated fragments of the present is the task of the Historian.
There are many mysteries in old age but the greatest, surely, is this: in those adverts for walk-in bathtubs, why doesn't all the water gush out when you get in?