'Cord of formlessness,' and 'the stone of the void,' as in Isaiah 34:11, signify the desolation and vastation of truth.
Arcana Coelestia#3222
3222. Moreover loves and their affections are represented by flames, and this with inexpressible variation; whereas truths are represented by lights, and by innumerable modifications of light. This shows whence it is that by “flames” in the Word are signified the goods which are of love; and by “lights” the truths which are of faith.