I think this song is about coming to the decision of leaving your home and family behind at a young age. "This once was an island" refers to the small town you grew up in or your house, while the "lights aways in season" is the allure of a big city as you get older and realize how big the world is.
The second verse is after a couple months when big city life doesn't have that special allure it once had. Some stay in the city, some leave to go back home.
The last four lines is someone trying to convince you to stay in the city. Your family might not want you back. Your parents long to see you come back home on your knees begging to stay with them.
I think this song is about coming to the decision of leaving your home and family behind at a young age. "This once was an island" refers to the small town you grew up in or your house, while the "lights aways in season" is the allure of a big city as you get older and realize how big the world is.
The second verse is after a couple months when big city life doesn't have that special allure it once had. Some stay in the city, some leave to go back home.
The last four lines is someone trying to convince you to stay in the city. Your family might not want you back. Your parents long to see you come back home on your knees begging to stay with them.