'Melchizedek' signifies the celestial parts of the interior self with the Lord. 'Melchizedek, a priest and king in one person,' represents the divine humanity of the Lord with respect to good and truth.

(References: Arcana Coelestia 1724)

1067. Verse 20. And Noah began to be a man of the ground, and he planted a vineyard. “And Noah began to be a man of the ground” signifies, in general, man instructed from the doctrinal things of faith; “and he planted a vineyard” signifies a church therefrom; a “vineyard” is the spiritual church.