Although my wife has heard me say these same words to her thousands of times, never once has she complained, "Stop saying the same thing over and over again!" In an intimate, personal relationship, two people may repeat to each other certain expressions of love, and each time the words express the heartfelt affection they have for one another. Repetition is part of the language of love.
In reciting the Hail Mary throughout the rosary, we participate over and over again the wonder-filled response of Gabriel and Elizabeth to the mystery of Christ. The name of Jesus, spoken with tender love, becomes the heartbeat of the the rosary.
–from the book Praying the Rosary Like Never Before
by Edward Sri