Wright Brothers National Memorial propelled himself into the air while wearing paddles on his arms and legs; An homage to Otto Lilienthal, a German who died while conducting gliding experiments; A reference to a French philosopher who thought that since dew rose in the morning, if it could be placed in an expandable bag attached to a box and sail, it would naturally rise when placed in the sun. (It didn't.) Right Door (top to bottom): Icarus, the Greek mythological figure who tried to fly from Crete by attaching feathers to his arms with wax. He fell when he flew too close to the
Golden mean (philosophy) flew up and up until the sun melted the wax off his wings. For not heeding the middle course, he fell into the sea and drowned. Another early elaboration is the Doric saying carved on the front of the temple at Delphi: ""Nothing in Excess"" ("Meden Agan"). The first work on the golden mean is sometimes attributed to Theano, wife of Pythagoras. To Cleobulus is attributed the maxim: "Mέτρον ἄριστον" "Moderation is best" Socrates teaches that a man must know "how to choose the mean and avoid the extremes on either side, as far as possible." In education, Socrates asks