“If you want to be seen, stand up.
If you want to be heard, speak up.
If you want to be appreciated, shut up.”
~ Bill Cosby

 William Henry Cosby, Jr. (July 12, 1937) An American comedian, actor, author, television producer, educator, musician & activist. A veteran stand-up performer, starred in a number of TV shows, I Spy, The Bill Cosby Show,  The Electric Company, & created the educational cartoon comedy series Fat Albert & the Cosby Kids, & acted in a number of films. Source