'Manna' signifies celestial and spiritual good. 'Hidden manna,' as in Revelation 2:17, signifies hidden wisdom, like people have in the third heavens, whose superior wisdom is written in their lives, and not so much in the memories. 'Hidden manna,' in the highest sense, signifies the Lord Himself. 'Manna' signifies the good of truth. It also signifies the good of celestial love conjoined to wisdom.

(Odkazy: Apocalypse Explained 730; Apocalypse Revealed 120)

120. "'I will give to eat of the hidden manna.'" This symbolizes wisdom and an assimilation of the good of celestial love then, and thus a conjunction of the Lord with those who perform works.

The hidden manna that people will have who are engaged in good works and at the same time add doctrinal truths to the works, means a private wisdom, such as people have who are in the third heaven. For as these were focused on good works and doctrinal truths simultaneously in the world, they enjoy a wisdom beyond that of other angels, but a private wisdom, for it is engraved on their life and not so much on their memory. Therefore people of this character are such that they do not talk about doctrinal truths but practice them, and they practice them because they know them and also see them when others talk about them.

The goodness of love is imparted to people who add doctrinal truths to their good works, and the Lord conjoins Himself with them and thus grants them wisdom in their good works; and that this is what it is to give to eat of the hidden manna can be seen from these words of the Lord:

...the bread of God is He who comes down from heaven and gives life to the world... I am the bread of life... Your fathers ate the manna in the wilderness, and are dead. This is the bread which comes down from heaven, that anyone who eats of it does not die. I am the living bread which came down from heaven. If anyone eats of this bread, he will live forever. (John 6:31-58)

It is apparent from this that the Lord Himself is the hidden manna that will be in their works if they turn to Him alone.

Whether you say the Lord or the good of celestial love and the wisdom of that love, the meaning is the same. But this is an arcanum that falls with difficulty into anyone's natural comprehension, as long as it is clouded over with worldly notions. However, it does fall within the comprehension when it comes into a state of serenity and sunshine, as can be seen from beginning to end in Angelic Wisdom Regarding Divine Love and Wisdom.