The song "Let Me Into Your World" by Harold Melvin & The Blue Notes is about the narrator's desire to be let into someone's personal world and be a part of their life. The lyrics express a longing to be with someone who appears to be sophisticated and confident, but keeps their distance, not allowing the narrator to fully enter their world. The narrator admires this person and expresses their love for them, questioning why they are putting them through changes and keeping them at a distance. They plead for the person to open up and let them in, wanting to be a part of their world and build a happy home together. The song also touches upon the idea that life is too short to be lived alone, emphasizing the importance of companionship and love. The narrator feels that being on the outside is not desirable and wants to be on the inside, close to the person they love. Overall, the song conveys a sense of longing, love, and yearning for emotional connection with someone who seems guarded and distant.