In Exodus 26:26, this signifies the power of truth from good, as found in the good of merit, which is the Lord's alone. (Arcana Coelestia 9662)

In Exodus 26:28, this signifies the power of truth looking toward the interiors which are in light and also to the exteriors where truth is obscure. (Arcana Coelestia 9663, 9664)

In Exodus 26:29, this signifies the primary power of good from which all other powers are extended. (Arcana Coelestia 9666)

Bars, as in Lamentations 2:9, signify doctrinal teachings.

(Посилання: Arcana Coelestia 402)

9664. 'And five bars for the boards of the other side of the dwelling-place' means the power of truth from good when it looks towards the more external parts, where truth dwells in obscurity. This is clear from the explanations immediately above in 9662, 9663.