3879. 'She conceived again and bore a son' means spiritual conception and birth from what is external towards that which is more internal still. This is clear from what has been stated in 3860, 3868, where similar words occur.

In Isaiah 21:12, this signifies that, although there is illumination with people in the new church, people in the old church are still in a state of darkness and night. (Arcana Coelestia 10134[11])