Who said "The seeds of greatness are often sown in sorrow."?

This quote is attributed to Rhaegar Targaryen.

The seeds of greatness are often sown in sorrow. - Rhaegar Targaryen

"The seeds of greatness are often sown in sorrow."

Rhaegar Targaryen Perseverance

"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."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."