582. 13:5 And it was given a mouth speaking great and blasphemous things. This symbolically means that the doctrine teaches evils and falsities.

A mouth speaking symbolizes doctrine, preaching and discourse (no. 452). To speak great and blasphemous things means, symbolically, to teach evils and falsities. For greatness is predicated of goodness, and in an opposite sense, of evil (nos. 656, 663, 896, 898), and blasphemies symbolize the Word's truths falsified, thus falsities. What blasphemies symbolize here specifically may be seen in no. 571 above.

The doctrine teaches evils because it dissociates works of the law, thus things one ought to do, from salvation, and anyone who does this becomes caught up in spiritual evils, which are sins.