I have definitely written a happy song about someone and then we ended up splitting up, but you have to put those kind of things to the back of your mind and tell yourself that it's a good song and it works on the album.
When the Israeli leaders launched their expansionist war in June 1967 they never envisaged that 40 years later they would still be haunted by the consequences.
Fundamentally I feel that there is as much difference between the stage and the films as between a piano and a violin. Normally you can't become a virtuoso in both.