Hey theguitarplayer,
Thanks for checking out the song I TRULY appreciate it... Also, sorry it took me this long to reply to you. I just noticed this morning I had a reply.
As far as what the song is about... Imagine Jesus/God is singing those lyrics to all of us. The opening line is the introduction... "I am the light's eternal light. I am the golden day and night. I bring to you a time for now." (The line "I bring to you a time for now" refers to the gift of life he has given us as well as eluding to it being a warning... The warning being that it's just a short time.)
If you listen again keeping that in mind I think it will become obvious... the premise of "Well done thy good and faithful servant" AND "Get thee hence from me, I never knew you" is the mindset. It's judgment day...
It's a bit of a "Stealth" Christian song haha. Also, the fact that you have "Christ Is The True Light!" in your reply is AWESOME!! I couldn't ask for a more perfect person to have listened and asked about the subject matter.
God Bless You!!!