The song has a lot to do with Sonic Adventure, since it was made for that game. The disasters he's singing about are Chaos destroying the city. He's either talking about Eggman or Chaos as the evil person here.
It may also have another meaning about our world in general, just the struggle between good and evil, and how we can't always be on guard - we have to "open our hearts"
Just a note: In the game version of this song, when you fight chaos, he opens with a loud long "Alright!"
The song has a lot to do with Sonic Adventure, since it was made for that game. The disasters he's singing about are Chaos destroying the city. He's either talking about Eggman or Chaos as the evil person here.
It may also have another meaning about our world in general, just the struggle between good and evil, and how we can't always be on guard - we have to "open our hearts"
Just a note: In the game version of this song, when you fight chaos, he opens with a loud long "Alright!"