Who said "I am the poet of commonsense and of the demonstrable."?

This quote is attributed to Walt Whitman.

I am the poet of commonsense and of the demonstrable. - Walt Whitman

"I am the poet of commonsense and of the demonstrable."

Walt Whitman Truth

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."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."