"Poetry is pretty inconsequential

when written young," wrote the Great Poet Rilke. 
"But at the end of a (preferably long)
lifetime of sense and sweetness ten good lines might be written.
Real poetry comes not from emotion, but from experience."

What twaddle!  Lifetime of sense and sweetness ?
Keats had written fine poems by the time he was twenty -
and Rimbaud at seventeen had already written some of his best,
none of them pompous, some of them startlingly unrepressed...