The star which leads us to Jesus is sacred Scripture. Behold our light has already come (Is 60:1), because for us and for our salvation God has become man. He was seen on earth and dwelt among us men and women, so that, by the might of his word and the example of his life he might enlighten those who are sitting in darkness and direct them into the way of peace (Lk 1:79). It is no wonder that before the Lord’s coming, when they heard nothing of God, when they did not discern the light of Scripture, the pagans lay prostrate in their sins and in the darkness of their errors. But now lying prostrate in carnal desires and in the darkness of inequities is a matter for great agitation, for the true light that enlightens every one coming into this world (Jn 1:9), Christ Jesus, has now come. We cannot have further excuse for our sins, for Christ, who takes away the sins of the world and justifies, for the wicked, now speaks to us openly. Someone who follows me does not walk in darkness but will have the light of life (Jn 8:12).
Saint Aelred of Rievaulx
Sermon 4 for the Epiphany, 32-33