Western Saints
Gregory the Dialogist
Behold even to the moon, and it shineth not; yea, the stars are not pure in His sight. What is denoted by 'the moon' but the whole Church together? what by 'the stars' but the souls of the several persons that live rightly? who amidst the practices of wicked men, whilst they are conspicuous by rare virtues, as it were shine in the darkness of night. Whence likewise it is said by Paul to the disciples; Among whom ye shine like lights in the world. …
Morals on the Book of Job, Book XVII ↗
Thomas Aquinas
Next, he strengthens what he had said with a metaphor when he then says, "Behold! Even the moon does not shine, and the stars are not pure in his sight." Here consider that he does not mention the sun because it is not evident to the senses that its light is obscured in the presence of a brighter light. But the moon and the stars are darkened even in the presence of the corporeal light of the sun, and so their brightness seems even more like darkness, compared to the immensity of divine light. …
Commentary on Job ↗