by Jonah Lehrer and his book Imagine:

You must be prepared to fail to be creative. Yo Yo Ma, the famous violinist, said, “Perfection is not very communicative…if you are worried about not making any mistakes, then you will communicate nothing…I welcome the first mistake as then I can shrug it off…and turn off that part of the mind that judges everything…it’s when I am least conscious of what I’m doing, when I’m just lost in the emotion of the music, then I’m performing at my best.”