I just finished listening to Mozart's Symphony No. 1 in Eb Major for the first time. It's a very nice piece of music with some notable flourishes. Oh . . . and perhaps you don't know this (I didn't): Mozart was 8 years old when he wrote this symphony. This leads me to ask myself: "How is this possible?"  I have no answers.  It seems impossible. Here's the first page of the handwritten manuscript written by 8-year old Mozart: