As the song progresses, the speaker acknowledges the challenges and obstacles he faces in pursuit of his dreams, but he remains determined and optimistic. He believes that, just as the fireflies light up the night, his dreams have the power to illuminate and transform his life. The song ends with the speaker expressing his determination to follow his heart and pursue his dreams, no matter what obstacles he may face.
In summary, "Fireflies" is about the power of dreams, the beauty of possibility, and the importance of perseverance in the face of challenges.