“People may say I can't sing, but no one can ever say I didn't sing.”
Attributed without citation in Vernon Alfred Howard, Charm and Speed: Virtuosity in the Performing Arts http://books.google.co.uk/books?id=qLXVeMzOvncC&pg=PA129&dq=%22People+may+say+I+can%27t+sing,+but+no+one+can+ever+say+I+didn%27t+sing.%22&hl=en&sa=X&ei=V4nPUqCCMs2ThgeusoGwAw&ved=0CDQQ6AEwAA#v=onepage&q=%22People%20may%20say%20I%20can%27t%20sing%2C%20but%20no%20one%20can%20ever%20say%20I%20didn%27t%20sing.%22&f=false (2008), p. 129.