Who said "Change is inevitable, and one must adapt to survive."?

This quote is attributed to The Humbug.

Change is inevitable, and one must adapt to survive. - The Humbug

"Change is inevitable, and one must adapt to survive."

The Humbug Change

Character in The Phantom Tollbooth

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"How many people do you suppose have to believe something before it's true?"

"We must make the most of each moment."

"You must always be careful when thanking someone."

"Rules and regulations are all very well, but you must always act according to your conscience."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."