The Mind of Brian

An analysis of the chord structure of the song that Paul McCartney once said is his favorite, Brian Wilson's God Only Knows. I agree with Sir Paul, it is certainly one of the greatest songs ever written, and not only due to the music. The words are among the greatest too:

...If you should ever leave me
Though life would still go on believe me
The world could show nothing to me
So what good would living do me...