Paul speaks of the truth as if it were light and day. Alternate translation: "For you know the truth, like people who live in the light, like people during the day" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Paul speaks of evil and ignorance about God as if they were darkness. Alternate translation: We are not unknowing, like people who live in the darkness, like people at night" (See: [[rc://en/ta/man/translate/figs-metaphor]])