Who said "Change is the only constant, and I welcome it."?

This quote is attributed to Daenerys Targaryen.

Change is the only constant, and I welcome it. - Daenerys Targaryen

"Change is the only constant, and I welcome it."

Daenerys Targaryen Change

"I am the blood of Old Valyria. I am the dragon."

"A dragon is not a slave."

"I will take what is mine with fire and blood."

"The night is dark and full of terrors, but so is the day."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."