I think that this song is about a man who had a good life but didn't appreciate it. Since he was so blind and ungrateful he started sinning, and the song urges the boy to go back to his old life. While he has plenty of oppurtunities to go back, still he allows his pure soul to slowly fade away as he allows his sins to overcome him. So now the question is whether he will realize how sick his mistakes are and take the secret "train in the night" back into his old life. This implies that no one has to know of his mistakes.
I think that this song is about a man who had a good life but didn't appreciate it. Since he was so blind and ungrateful he started sinning, and the song urges the boy to go back to his old life. While he has plenty of oppurtunities to go back, still he allows his pure soul to slowly fade away as he allows his sins to overcome him. So now the question is whether he will realize how sick his mistakes are and take the secret "train in the night" back into his old life. This implies that no one has to know of his mistakes.