In Judges 5:18, and Isaiah 9:1, Zebulon and Naphtali together signify reformation and regeneration through temptation; and in the highest sense the uniting of the Divine and Human in the Lord. (Apocalypse Explained 439[4, 5], 447[5])

When they are the only two tribes taken to fight, it signifies combat from truth that comes from good, as Zebulon signifies the conjunction of good and truth. So together they signify combat against falsities and evils and the spiritual reformation that follows. (Apocalypse Explained 447[4, 5])

In John 14:6, 'the way' is doctrine, 'the truth' is every thing pertaining to doctrine, and 'the life' is the essential good which is the life of truth.

(Odkazy: Arcana Coelestia 2531)