"A Felicidade," composed by Antônio Carlos Jobim with lyrics by Vinícius de Moraes in 1958 for the film Black Orpheus, explores the profound fragility of happiness. The lyrics open with the poignant line, "Sadness has no ending. Happiness does," setting the tone for a reflection on joy's fleeting nature. It likens happiness to a drop of dew, a feather caught in the wind, and the temporary escape of the poor into Carnaval's fantasies. In the context of the film, the song also speaks to a desperate search, mirroring Orfeu's quest for Euridice after her death. It's a beautiful, melancholic meditation on how quickly joy can vanish, leaving behind a lingering sense of longing.