There are two kinds of worries - those you can do something about and those you can't. Don't spend any time on the latter.
Duke EllingtonI donโt believe in categories of any kind, and when you speak of problems between blacks and whites in the U.S.A. you are referring to categories again.
Duke EllingtonMy biggest kick in music -playing or writing- is when I have a problem. Without a problem to solve, how much interest do you take in anything?
Duke Ellington