Who said "Every soul has the capacity for both light and darkness."?

This quote is attributed to Rhaegar Targaryen.

Every soul has the capacity for both light and darkness. - Rhaegar Targaryen

"Every soul has the capacity for both light and darkness."

Rhaegar Targaryen Philosophy

"The dragon has three heads."

"I have a duty to my realm and to the future."

"Music is the voice of the soul."

"Love is the most powerful force in the world."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."