"Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life."
That's chapter 8, verse 12 of the book of John in the King James Bible, in case you didn't know. One group of people who will be seeing it a lot are British soldiers stationed in Afghanistan. New rifle gun sights purchased from US firm Trijicon by the Ministry of Defence bear the etched biblical reference "JN8:12".
"As part of our faith and our belief in service to our country, Trijicon has put scripture references on our products for more than two decades," said a company spokesperson.
"As long as we have men and women in danger, we will continue to do everything we can to provide them with both state of the art technology and the never-ending support and prayers of a grateful nation."