Why was art important to the Greeks?

The Renaissance was shaped by humanism- the study of the classical antiquity/world - ancient Greek and Rome. ---- The Greco-Roman contribution to art lies in the fact that the art of the Renaissance was a rebirth of the art knowledge fron that time period that was lost during the Middle or Dark Ages. Renaissance art displays human figures with emotion and paints using perspective which was not used in the simple and symbolic art of the Middle Ages. Renaissance art advancement and that of every other branch of study improved because scholars, by the idea of Humanism, studied lost and refound ancient manuscripts. ---- So paradoxically, Renaissance art improved by regressing previous times before the chaos that insued after the collapse of the Western Roman Empire (which led to the Dark/ Middle Ages).