St. Cecilia, ... really?

I read someplace that Cecilia, Simon and Garfunkel's jolly tune, is based on Saint Cecilia... er... really?
?
Aaah... as in:
"The song does reference St. Cecilia and describes Simon's frustration with his muse leaving him and his jubilation upon her return"  
(had this quote written down in a notebook... have to try and see from where I got it)

I always loved this song so nice to know not just about a flighty girlfriend, but about the artist's muse. And it's rhythm also goes along perfectly well with the rhythm of opening a can with and old fashioned can-opener!

                             Cecilia 
                                        — Simon & Garfunkel

                             CHORUS:
                             Cecilia, you're breaking my heart,
                             You're shaking my confidence daily.
                             Oh Cecilia, I'm down on m my knees,
                             I'm begging you please to come home.
                             Come on home

                             CHORUS

                             Making love in the afternoon
                             with Cecilia up in my bedroom,
                             I got up to wash my face
                             When I come back to bed,
                             Someone's taken my place

                             CHORUS

                             Jubilation,
                             She loves me again,
                             I fall on the floor and I'm laughing
                             Jubilation,
                             She loves me again,
                             I fall on the floor and I'm laughing