Who said "I sound my barbaric yawp over the roofs of the world."?

This quote is attributed to Walt Whitman.

I sound my barbaric yawp over the roofs of the world. - Walt Whitman

"I sound my barbaric yawp over the roofs of the world."

Walt Whitman Courage

Poet American 1819–1892

"Do I contradict myself? Very well then I contradict myself, (I am large, I contain multitudes.)"

"I celebrate myself, and sing myself."

"Keep your face always toward the sunshine, and shadows will fall behind you."

"The future is no more uncertain than the present."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."