'The liver,' as in Exodus 29:13, signifies interior purification, and 'the caul above the liver,' the inferior good of the external or natural self.

(Odkazy: Arcana Coelestia 10031)

In Isaiah 6:13, this signifies remains or a remnant, which the Lord preserves in everyone, lest he perish in eternal death. (Arcana Coelestia 468)