Just as natural food feeds the natural body, so too does spiritual food feed the spiritual body. And since our spiritual body is the expression of what we love, then spiritual food is what feeds our state of love: It is the desire for good, the delight of being good, the understanding of what it is to be good and the knowledge of all that's true and leads to what is good. So when food is talked about in the Bible, that's what it means, and the huge variety of forms food can take represent the huge variety of good we can seek in life and the huge variety of thought we can have leading to it.

(Verweise: Arcana Coelestia 680, 1695, 4792, 5147, 5293, 5576, 9003)

5576. 'And the famine grew more serious' means the desolation resulting from the dearth of spiritual things. This is clear from the meaning of 'the famine' as an absence of cognitions of goodness and truth, dealt with in 3364, 5277, 5279, 5181, 5300, and the consequent desolation, 5360, 5376, 5415. And because desolation can arise from a shortage and consequent dearth of spiritual realities, 'the famine' has this meaning too. A famine in the spiritual world or heaven is not a hunger for [bodily] food, for angels do not feed on material food, which is the food for that body which a person carries around in the world. Rather it is a hunger for the kind of food that nourishes their minds, and this, which is called spiritual food, consists in understanding what is true and in having a wise discernment of what is good. And what is amazing, angels are nourished with this food.

[2] This has been made clear to me by the fact that after young children, who have died as young children, have been furnished in heaven with truths that are the constituents of intelligence and with forms of good that are the essence of wisdom, they no longer look like young children but adults, increasingly so as goodness and truth increase with them. The nourishment of angels by spiritual food has also been made clear to me by the fact that they have a constant desire for those things that are the constituents of intelligence and wisdom. At their eveningtime, that is, when they pass through a state in which they lack what they desire, that state compared with other states holds no happiness for them. In that state there is nothing that they hunger and long for more than a new dawning of morning light upon them and their return to the life filled with happiness that comes with intelligence and wisdom.

[3] It may also be seen by anyone who stops to reflect on the matter that understanding what is true and desiring what is good constitute spiritual food. If someone who is enjoying material food that serves to nourish the body is at the same time in a cheerful state of mind and is engaged in conversation about the kinds of things that accord with that state of mind, the material food for the body becomes all the more nourishing. This is an indication of the existence of a correspondence between spiritual food, which feeds the soul, and material food, which feeds the body. The same is clear in addition from the experience of someone who has the desire to furnish his mind with ideas that constitute knowledge, intelligence, and wisdom. If he is denied these he begins to feel sad and distressed, and like somebody in time of famine he has the desire to return to his spiritual food and so to the nourishment of his soul.

[4] It may also be seen from the Word that spiritual food is what nourishes the soul in the way material food nourishes the body, as in Moses,

Man does not live by bread only, but man lives by every utterance of the mouth of Jehovah. Deuteronomy 8:3; Matthew 4:4.

In general 'utterance of the mouth of Jehovah' is the Divine Truth which goes forth from the Lord, and so is every truth contained in wisdom; specifically it is the Word, the foundation and source of ideas constituting wisdom. And in John,

Do not labour for the food which perishes, but for the food which endures to eternal life, which the Son of Man will give you. John 6:17.

This 'food' is clearly the truth that is contained in wisdom and that goes forth from the Lord.

[5] From this one may also recognize what is meant by these words of the Lord recorded in the same chapter,

My flesh is truly food, and My blood truly is drink. John 6:55.

That is to say, 'the Lord's flesh' is Divine Good, 3813, and 'His blood' Divine Truth, 4735. For now that the Lord has made His Human completely Divine, His 'flesh' is nothing else than Divine Good, and His 'blood' nothing else than Divine Truth. One has to understand that in the Divine there is nothing material; therefore in the highest sense, that is, where it has reference to the Lord, 'food' is the Good of Divine Love directed towards the salvation of the human race. This food is also the kind that is meant by the Lord's words in John,

Jesus said to the disciples, I have food to eat of which you do not know. My food is to do the will of Him who sent Me, and to finish His work. John 4:32, 34.

'Doing the will of Him who sent Me, and finishing His work' is saving the human race; and the Divine attribute which motivates this is Divine Love.

From all this one may now see what is meant in the spiritual sense by 'the famine'.