"The true light that enlightens every man was coming into the world." - St. John 1:9 (RSV-CE)
"Erat lux vera, quae illuminat omnem hominem, veniens in mundum." - St. John 1:9 (New Vulgate)
The Word, the Christ, the Son of God, Jesus enlightens every man.
This is the reason we Christians must evangelize without ceasing.
This is why we Christians must work at reconciling our broken relationships with those who are closest to us without ceasing, even if our attempts are limited to praying for the other person in the quiet of our rooms.
This is why we Christians must ask for and grant forgiveness without ceasing.
Jesus, the true light, enlightens every man.