Arcana Coelestia #4346
4346. 'And he himself passed over in front of them' means that which is universal and so means all things. This is clear from the representation of Jacob, to whom 'he' refers here, as that good of truth, that is, truth in will and action, dealt with in 4337. The good of truth is the universal embodiment of every kind of truth, for the general, the particular, and the specific kinds of it spoken of immediately above all go with it because they are included within it.
Neck
'The neck' signifies influx and the communication of interior and exterior levels and their conjunction. The inmost or third heaven has reference to the head and the middle or second heaven has reference to the body. Therefore, because it is in the middle, 'the neck' signifies influx, and the communication of celestial things with spiritual things.
(Verweise: Arcana Coelestia 3603, 5328)