Santayana

Art, like life, should be free, since both are experimental. - Philosopher, poet, literary and cultural critic, George Santayana

He is perhaps best known for his oft-quoted

"Those who cannot learn from history are doomed to repeat it," from Reason in Common Sense, the first volume of his The Life of Reason.

Also like this one:

"To have imagination and taste, to love the best, to be carried by the contemplation of nature to a vivid faith in the ideal, all this is more, a great deal more, than any science can hope to be. The poets and philosophers who express this aesthetic experience and stimulate the same function in us by their example, do a greater service to mankind and deserve higher honor than the discoveries of historical truths." - from The Sense of Beauty

More quotes from him here.