Who said "Adventure calls to those with courage enough to answer."?

This quote is attributed to Rhaegar Targaryen.

Adventure calls to those with courage enough to answer. - Rhaegar Targaryen

"Adventure calls to those with courage enough to answer."

Rhaegar Targaryen Adventure

"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."

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."