Who said "The heart of the matter is that people must change."?

This quote is attributed to Jack London.

The heart of the matter is that people must change. - Jack London

"The heart of the matter is that people must change."

Jack London Change

Novelist American 1876–1916

"The proper function of man is to live, not to exist."

"I would rather be ashes than dust."

"You can't wait for inspiration. You have to go after it with a club."

"The wise man doesn't give the right answers, he possesses the right questions."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."