"For the whole world was illumined with brilliant light and went about its work unhindered, while over those people alone heavy night was spread." (Wisdom 17:20)
Wisdom meditates on the plague of darkness that fell on Egypt while Israel had light: for great are your judgments, and it is hard to describe them; therefore uninstructed souls have gone astray. For when lawless people supposed that they held the holy nation in their power, they themselves lay as captives of darkness and prisoners of long night, shut in under their roofs, exiles from eternal providence. They supposed that their secret sins were hid under the dark curtain of oblivion, but they were scattered, terribly alarmed, and appalled by spectres. For neither is the power of fire strong enough to give light, nor were the brilliant flames of the stars able to illumine that loathsome night. For the whole world was illumined with brilliant light and went about its work unhindered, while over those people alone heavy night was spread, an image of the darkness that was destined to receive them.
The Catechism draws from this passage the theology of sin as darkness: the refusal of the divine light produces the interior darkness that becomes increasingly impenetrable (CCC 1021).
Brothers and sisters, over those people alone heavy night was spread. The darkness that fell on Egypt during the exodus was a figure of the spiritual darkness that is the consequence of rejecting the light. The whole world went about its work in brilliant light while those who had rejected God could not see their own hands before their faces. Choose the light. Walk in it. The darkness is always the choice of its own.
Lord God, the whole world was illumined with your light. Let us not be the ones over whom heavy night is spread. Draw us into your brilliant light. Through Christ our Lord. Amen.