The structure of the song is rather intriguing. It opens with an intro that contains no musical elements found in the rest of the song, and the body of this song has no real verse/chorus structure, just two verses that each turn halfway through on an unexpected chord.
The song is very expressive, with large intervals between the notes in a quasi-modal way. Typical of Lennon are the emphasis on three recurrent long notes ("...give my heart..."). It has similarities with John Dunstable's motet "Quam pulchra es" from the fifteenth century. The introduction is also unusual, with four modulations - even tighter than most music from late romantic music.
Johan Cavalli, who is a music historian in Stockholm