Musa translates to "muse," a person or force that inspires an artist. The word comes from the Muses of Greek mythology, who were the goddesses of the arts, literature, and science.
In "Vivo Por Ella," the entire song is a passionate ode to a mysterious "ella" (her). The line "Es la musa que te invita" (She is the muse that invites you) is a key clue, revealing that the singer's devotion is not for a woman, but for his artistic inspiration: music itself. This clever, poetic personification is the heart of the song.
At first, "Vivo Por Ella" sounds like a classic, dramatic love duet. Andrea Bocelli and Marta Sánchez sing about a mysterious 'her' who has completely taken over their lives. They sing, "Vivo por ella sin saber si la encontré o me ha encontrado" (I live for her without knowing if I found her or she found me). This 'her' is everything: she's a constant companion who ends their loneliness and the one who gives them "fuerza, valor y realidad" (strength, courage, and reality). It's so intense! There's even a funny, clever line where Marta tells Andrea, "No te me pongas tan celoso" (Don't get so jealous of me), as if he might misunderstand who she's singing about.
And that's the beautiful secret of the song! They aren't singing about a person. They give us clues, mentioning how she is "la musa que te invita... en mi piano" (the muse that invites you... on my piano) and how "ella canta en mi garganta" (she sings in my throat). In the final lines, they reveal her identity directly: "ella se llama música" (her name is music). The entire song is a powerful declaration of love for music itself, personified as a woman. It's about how music is the driving force in an artist's life, a faithful and sincere companion they would live for again and again.