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

This quote is attributed to Glenn Rhee.

I've learned that change is the only constant. - Glenn Rhee

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

Glenn Rhee Change

"I'm not gonna die. Not today."

"We have to keep moving forward. That's all we can do."

"People are worth saving."

"I owe you my life. I won't forget that."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."