'Thirty' has a twofold significance because it is is the product of five and six, and also three and ten. From five multiplied by six, it signifies some aspect of combat, because 'five' signifies some part or aspect, and 'six,' combat. From three multiplied by ten, it signifies something full of remains of good and truth, because 'three' signifies fullness, and 'ten,' remains of good and truth. A composite number involves the same as the simple numbers it has as its factors.

(Odkazy: 2 Samuel 5:4; Arcana Coelestia 5335; Luke 3, 3:23, 23; Numbers 4:3, 4:23, 4:30)

Animals in general represent our spiritual activity. This can mean forming thoughts, ideas, or intellectual concepts; it can also mean having feelings and desires. The variety of the animal kingdom represents the vast variety of our potential spiritual activities, the things we think and feel, and each kind of animal represents something in particular. All life comes from the Lord, and the more we are turned to the Lord and receptive of Him, the more we are truly alive.