Who said "Why don't you take a look at what you've done."?

This quote is attributed to Paul Simon.

Why don't you take a look at what you've done. - Paul Simon

"Why don't you take a look at what you've done."

Paul Simon Truth

Singer Songwriter American Born 1941 (age 85)

"The more I study the world, the more I am convinced of the inability of brute force to create anything durable."

"You can call me Al."

"I am just a poor boy, though my story's seldom told."

"The only living boy in New York."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."