And God said, “Here, now, I am giving you every seed-bearing plant on the face of all the earth and every tree that has fruit; the tree that produces seed will serve you for food.”
A person whose nature is heavenly enjoys only heavenly things, which are called heavenly food because they harmonize with the life such a person lives. A person whose nature is spiritual enjoys spiritual things, which are called spiritual food because they harmonize with the life this person lives. A person focused on the physical world similarly enjoys earthly things, which are called food because they are vital to such a person; these are mainly facts.
As spiritual people are the subject at present, their spiritual food is depicted by the representative items here. The seed-bearing plant represents a spiritual type of this food, as does the tree that has fruit; the more general term for both is the tree that produces seed. These people’s earthly food is described in the next verse.
The seed-bearing plant is every true idea that looks toward a useful goal. The tree that has fruit is religious good; the fruit is what the Lord gives the heavenly person, but the seed leading to new fruit is what he gives the spiritual person, which is why it says the tree that produces seed will serve you for food.
The next chapter, [Secrets of Heaven §§66-136], treating of the heavenly type of person, will demonstrate that heavenly food is called the fruit from a tree. Here the Lord’s words through Ezekiel will suffice:
Beside the river, on its bank, on this side and that, grows every food tree. Its leaf will not fall, and its fruit will not be used up. Month by month it is reborn, because its waters are going out from the sanctuary. And its fruit will serve as food, and its leaf, as medicine. (Ezekiel 47:12)
“Water from the sanctuary” symbolizes the living energy and mercy of the Lord, who is the “sanctuary.” The fruit symbolizes wisdom, which is food to people of heavenly character. The leaf is intelligence, which is given to them for a purpose referred to as “medicine.”
The idea that spiritual food is called a plant (or grass), though, is expressed in David:
My shepherd, I will lack nothing. In grassy pastures you make me lie down. (Psalms 23:1, 2)
from Regeneration, Pages 157-159