866. That a "raven" signifies falsities, is evident in a general way from what has been said and shown above concerning birds, that they signify things of understanding, of reason, and of memory-knowledge, and also the opposite, which are reasonings and falsities. Both of these are described in the Word by various species of birds; truths of understanding by birds which are gentle, beautiful, and clean; and falsities by those which are ravenous, ugly, and unclean, in each case varying according to the species of truth or falsity. Gross and dense falsities are described by owls and ravens; by owls because they live in the darkness of night, and by ravens, because they are of a black color. As in Isaiah: