"To the Greeks, arete meant excellence and reaching one's full potential. Ancient Greek art emphasized the importance and accomplishments of human beings."
source: ushistory.org
and
"Ancient Greek art was influenced by the philosophy of the time and that shaped the way they produced art forms. The difficulty in understanding Ancient Greek art is that the philosophers held a theoretical view of colour and art while the artists were more pragmatic in their production of art."
source: edu.rsc.org
i hope this helps :)