When you go to bed you see that it is dark outside, but when you wake you see light. The light and dark of the day is very dissent, but they are very closely related. Dark and light are the fares things from each other, while you can't have light without dark meeting. In the "Ode on a Grecian Urn" and "Sailing to Byzantium" we see these differences. The difference in the "Ode on Grecian Urn" and " Sailing to Byzantium" are very distinctive especially in the themes of art verses nature in the battle between immortality. "Sailing to Byza ....