Lennon called the song "just a piece of nothing", though some have read the song as either a confession of troubles with his relationship with
Yoko Ono or a message to former bandmate
Paul McCartney. Music critic
Johnny Rogan noted that the song ends with a conclusion similar to that of Lennon's earlier song "
God": that only his belief in his relationship with Ono is real. Blaney points out that Lennon incorporates a "delicate guitar figure" he learned from
Donovan into the song, which Blaney believes "gives 'I Know (I Know)' and honesty that enhances his plea for his lover's absolution." Lennon worked hard when
overdubbing the song to develop the song's delicate
arrangement. ==Reception==