Tony Bennett sings " While We're Young"   This is a song by Alec Wilder, a composer and scholar whose encyclopedic dissection of what constitutes the greatness of Classic American Popular Song has become the bible for understanding the popular music that swept the world from 1900-1950 ( And which continues even today) Wilder wrote this song which was sung by Tony Bennett in a live performance with Alec Wilder in attendence.
I do disagree with the view that only the young can enjoy the power of song. At age 81, I spend a great deal of each day studying and listening to the songs of the past and great songs written today by Johnny Mandel, Paul McCartney, Joni Mitchell and todays singer/songwriters.

https://youtu.be/UpCwQjwSeg8