I still don't know how to express the really delicate...

I still don't know how to express the really delicate personal stuff. People think that Plastic Ono is very personal, but there are some subtleties of emotions which I cannot seem to express in pop music, and it frustrates me. Maybe that's why I still search for other ways of expressing myself. Song writing is a limiting experience in some ways - writing down words that have to rhyme.