I could be very wrong but I still think it's Romans 13:12 just the numbers were transposed.

Romans 13:12 states: "The night is well along; the day has drawn near. Let us therefore put off the works belonging to darkness and let us put on the weapons of the light."

It's like coming out of a spiritual darkness into the spiritual light, not with literal weapons but with a strong sense of faith. Like a change in ones heart condition when it comes to the truth.

Like I said, I could be very wrong, this is just my guess.