Who said "I've learned that change is the only constant."?

This quote is attributed to Lenny Leonard.

I've learned that change is the only constant. - Lenny Leonard

"I've learned that change is the only constant."

Lenny Leonard Change

"Woo-hoo! Life is just one big party, man."

"D'oh! I forgot what I was saying."

"That's the sweetest thing anyone's ever said to me."

"I'm gonna go back to school and become a astronaut."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."