Paul McCartney's song 'Some People Never Know' reflects on the complexities of love and relationships. Through introspective lyrics, McCartney delves into themes of misunderstanding, confusion, and the pure yet intricate nature of love. He expresses a contemplative resignation to the fact that some people may never fully understand the depths of these emotions. A particularly poignant moment in the song is when McCartney repeats the line 'Some people can sleep at night-time, believing that love is a lie,' highlighting a sense of disillusionment and longing for a more profound connection.