What does the image of "nightingale" mean in western culture?

There are two opinions about the image of Florence Nightingale in the west: the first one comes from Greek and Roman mythology, which holds that Florence Nightingale was changed by Romila, and she was very sad by crying, so Florence Nightingale is often regarded as a symbol of sadness. The second argument comes from the characteristics of the nightingale itself. The nightingale's song is euphemistic and can touch people's inner feelings. It is often used to express love and admiration for one's lover, so it is endowed with romantic and cheerful colors, symbolizing love, happiness and freedom.