Who said "The only constant is change itself."?

The only constant is change itself. - Q

"The only constant is change itself."

Q Change

"I am Q. I exist outside your normal space-time continuum."

"You humans are so fragile, yet so determined to survive."

"The trial never ends, it simply evolves."

"Your species shows promise, though it is frequently buried under remarkable stupidity."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."