Where are you darlin', when my Moon is risin', and your Sun is shinin' down What are you doin', are you Missin' me The way that I'm missin' you now The river goes on and on, and the Sea that divides us is a Temporary one, and the Bridge will bring us back together What are you doin', goin' Down in to Soho as I Take my rest tonight What are you doin', are you Busy with your world Well I wish you were busy with mine The river goes on and on, and the Sea that divides us is a Temporary one, and the Bridge will bring us back together

This song reminds me of Paul and Linda because in 1968 they were apart for a time, across the ocean. Linda in New York and Paul in London. Because of the time difference, one was most probably sleeping, while the other one was wide awake, hence the lyric "my moon is risin; when your sun is shinin'". However, the time was indeed temporary and they were soon back together forever more.