How did the nightingale satisfy its hunger in the nightingale and the glowworm?

the glow has made use of his oratory skills to convince the nightingale on the importance of life, let it be even of a meagre insect. the world has a double minded out look, wherein the powerful are allowed to live whereas the weak are intended to die at the hands of the mighty. the glowworm suggests that if the nightingales destiny is to entertain with music, his is to light up the night and thus show the way to the needy.