Who said "The past shapes us, but need not define us."?

This quote is attributed to Sirius Black.

The past shapes us, but need not define us. - Sirius Black

"The past shapes us, but need not define us."

Sirius Black Change

Character in Harry Potter and the Prisoner of Azkaban

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"The world isn't split into good people and Death Eaters."

"Brave men don't need to kill to make a point."

"We've all got both light and dark inside us."

"Betrayal is the deepest wound."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."