The Latin 2002 Missale Romanum restored the ancient custom of the Oratio super populum at the end of Mass. It had been stripped out of the Novus Ordo by the liturgical engineers. When the new, corrected translation goes into effect, you may hear these prayers each day during Lent.
Happily there are no lame-duck ICEL versions to fight with.
Oratio super populum (2002MR):
Qui populo tuo, omnipotens Deus,
notas fecisti vias vitae aeternae,
per eas ad te, lumen indeficiens,
nos facias, quaesumus, pervenire.
The phrase lumen indeficiens is what catches your eye and ear right way. Light unfailing. This is from Scripture, Ecclesiasticus 24:6: ego in caelis feci ut oriretur lumen indeficiens et sicut nebula texi omnem terram. Latin Fathers such as Cyprian of Carthage, Maximus of Turin, and Augustine of Hippo worked with this phrase.
It winds up in old prayers, for example in the Liber sacramentorum Augustodunensis and Gellonensis. In later it part of a blessing for a lamp, candle or lantern, right after a fascinating blessing for soap.
SLAVISHLY LITERAL VERSION:
Almighty God, who made the paths
of eternal life known to Your people,
grant us, we implore, to come by them
to You, the unfailing light.
NEW, CORRECTED ICEL VERSION:
who have made known to your people
the ways of eternal life,
lead them by that path, we pray,
to you, the unfading light.
The image you have from this prayer is that God is the light which illuminates our way through this obstacle strewn paths of this world lest we lose our footing and, not just stumble and recover, but fall into the abyss where there is no light at all.
Through out the history of salvation, God has shown man the way to come to him. We knew many things by interior lights before the fall. After that, God has given commandments and symbolic actions which foreshadow clearer realities that would come in their due time. In the fullness of time the one who is Light from Light came into the light of this world to dispel the darkness of our own making. He is not only Light from Light, eternally, but, in time, He is the Way.
At the end of Mass you are sent into the daylight to continue to carry out your vocation. You need the light that God offers you in the teachings of the Church to guide your footsteps.