Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.
“You speak into it and everything is recorded, voice, tone, intonation, everything. You turn a little wheel, and forth it comes, and can be repeated ten thousand times. Only fancy what this suggests.”
“Irving Berlin was the greatest songwriter of all time. I was in awe of him. But his music wasn't my music. My music was the blues.”