In Deuteronomy 20:20, bulwarks signify the truth of faith as a protection against false doctrines. (Arcana Coelestia 8581[2])

In Psalm 48:13, this signifies to love the exterior truths which defend the church against falsities. (Apocalypse Explained 223[3], 453[10])

In Isaiah 26:2, bulwarks signify truths.

(റഫറൻസുകൾ: Arcana Coelestia 402)