Who said "Be yourself; everyone else is already taken."?

This quote is attributed to Perry, John.

Be yourself; everyone else is already taken. - Perry, John

"Be yourself; everyone else is already taken."

Perry, John

Philosopher American Born 1943 (age 83)

"Things are only impossible until they are not."

"The only way to do great work is to love what you do."

"Life is what happens when you're busy making other plans."

"In the middle of difficulty lies opportunity."