Giovanni Boccaccio, The Genealogy of the Pagan Gods, 1.9:
“The fact that Night is clothed in a painted coat clearly indicates that she is the very decoration of the sky, by which the sky is covered. Night (nox) however, as Papias says, is so called ‘because she harms (noceat) the eyes’; for she takes away their power of sight, since we see nothing at night. Night is harmful, further, in that she is well-suited to evil-doers, since we say ‘one who does evil hates the light’ – from this it follows that the evil-doer loves the shadows because they are more suited to the evil work. Even Juvenal says, ‘Thieves rise at night to cut the throats of others.’ Furthermore, Homer calls her the subduer of the gods in the Iliad, by which we may understand that since great-spirited people turn over important matters in their hearts at night, nevertheless night (not being suited to such things at all) oppresses their overflowing spirits, and overpowers them, subdued, all the way until the light.”
Quod autem picta palla amicta sit, facile videri potest illam celi ornatum significare quo tegitur. Nox autem, ut ait Papias, ideo dicitur quia noceat oculis; aufert enim illis videndi officium, cum nil nocte cernamus. Nocet insuper quia male agentibus apta est, cum legamus: Qui male agit odit lucem; exquo sequitur ut tenebras amet tanquam malo operi aptiores. Et dicit etiam Iuvenalis: Ut iugulent homines surgunt de nocte latrones. Omerus preterea in Yliade eam domitricem deorum vocitat, ut sentiamus quoniam nocte magnanimes ingentia pectoribus versant, tamen nox minime talibus apta ebullientes opprimit spiritus, eosque tanquam domitos in lucem usque coercet.