Fowl signify spiritual truth; a bird, natural truth; and a winged thing, sensual truth. Fowl of heaven, as in Hosea 2:18, signify the affections of truth; and reptiles of the earth, the affection of the knowledges of truth and good. Fowl signify thoughts, and all that creeps on the ground, the sensual principle. Fowl signify intellectual things.

(Referencat: Arcana Coelestia 777; Hosea 2)

In Isaiah 40:12 'to weigh the mountains in a balance, and the hills in scales,' signifies that the celestial aspects of love and charity are from the Lord, and that He alone disposes their states.

(Referencat: Arcana Coelestia 3101)