When the father distinguished day from night in his creation of the world, the act that separated them involved a judgment. This one was dark, the other light. But lightness and darkness followed one another more in an alternating sequence than in a relationship of cause and effect. This alternation was a sign that would be furnished to men, a sign according to which they could order their lives: their work and cessation, their activity and rest. the perfection of this ordering was destroyed by the darknesses of sin. But when the Son became man, he did not abolish creation’s law of day and night. Instead he simply led it beyond itself by bringing the light of God, so that, with it he could fight against the darkness of hell; he could break through its night with the radiance of this light, not simply to chase darkness out of the world but to fill it with a wealth of meaning.
– Adrienne von Speyr, Light and Images
Speyr was a Swiss convert and mystic who entered the Catholic Church under the direction of Hans Urs von Balthasar.