To angels, our world’s sun looks like something murky opposite to heaven’s sun, and our moon like something dim opposite to heaven’s moon, consistently. This is because our world’s fire corresponds to a love for ourselves, and the light it emits corresponds to the distortion that arises from that love. Love for oneself is the absolute opposite of divine love, and the distortion that arises from it is the absolute opposite of divine truth. Anything that is opposed to divine love and truth is darkness to angels.
This is why in the Word, worshiping our world’s sun and moon and bowing down to them means loving oneself and the distortion that arises from self-love, and why these are to be abolished (Deuteronomy 4:19; 18:3–5 [17:3–5]; Jeremiah 8:1–2; Ezekiel 8:15, 16, 18; Revelation 16:8; Matthew 13:6).
from Heaven and Hell, Section 122