Who said "The only certainty in life is change itself."?

This quote is attributed to Perry, John.

The only certainty in life is change itself. - Perry, John

"The only certainty in life is change itself."

Perry, John Change

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."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."