But perhaps there are insensitive hearts, still incapable of receiving this Light because the weight of their sins prevents them from seeing it. Let them not imagine that they Light is absent because they do not see it, for on account of their sins they are in darkness. ‘And the Light shone in the darkness, and the darkness understood it not’ (Jn 1:5). Therefore, Brothers, like the blind man exposed to the sun, the sun being present to him but he being absent from the sun, so the insensitive one, the sinner, the impious has a blind heart.
Augustine of Hippo
light, sin