Who said "The measure of a man is how he treats those below him."?

This quote is attributed to Rhaegar Targaryen.

The measure of a man is how he treats those below him. - Rhaegar Targaryen

"The measure of a man is how he treats those below him."

Rhaegar Targaryen Kindness

"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."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."