751. Verse 12. For this rejoice, ye heavens and ye that dwell in them, signifies the salvation and consequent joy of those who become spiritual by the reception of Divine truth. This is evident from the signification of "rejoicing," as being joy on account of salvation; also from the signification of "heavens," as being those who are spiritual (of which presently); also from the signification of "ye that dwell," as being those who live, here spiritually. (That "to dwell" signifies to live, see above, n. 133, 479, 662.) "The heavens" signify those who are spiritual, because all who are in the heavens are spiritual; and because men who have become spiritual are likewise in the heavens, although in respect to the body they are in the world, so "ye that dwell in the heavens" means not only angels, but also men. For every man with whom the interior mind, which is called the spiritual mind, has been opened, is in the heavens, yea, sometimes he even appears among the angels in the heavens. That this is so has not been known heretofore in the world; let it be known, therefore, that man in respect to his spirit is among spirits and angels, and even in that society of them into which he is to come after death. This is because the spiritual mind of man is formed wholly to the image of heaven, even so that it is a heaven in least form; consequently that mind, although it is still in the body, must nevertheless be where its form is. But this has been more fully illustrated in the work on Heaven and Hell 51-58, where it is shown that every angel and also every man, in respect to his interiors, if he be spiritual is a heaven in least form, corresponding to heaven in its greatest form. For this reason, where the Word treats of the creation of heaven and earth the church internal and external is meant in general, as also in particular the internal and external man, or the spiritual and natural man. From this it can be seen that "the heavens and those that dwell in them" signify all who are there, also men who are becoming spiritual by the reception of Divine truth in doctrine and life.

In the Word, arrows stand for truths which defend person from falsity.

In Arcana Coelestia 2709, it says this when discussing Genesis 21:20:

"And he became a shooter of the bow." That this signifies the man of the spiritual church, is evident from the signification of a “shaft,” “dart,” or “arrow,” as being truth; and from the signification of a “bow,” as being doctrine (see above, n. Arcana Coelestia 2686). The man of the spiritual church was formerly called a “shooter of the bow,” because he defended himself by truths, and disputed about truths; differently from the man of the celestial church, who is secure by means of good, and does not dispute about truths (see above, n. Arcana Coelestia 2708). The truths by which the man of the spiritual church defends himself, and respecting which he disputes, are from the doctrine which he acknowledges.

[2] That the spiritual man was in old time called a “shooter” and an “archer,” and that doctrine was called a “bow” and a “quiver,” and that the truths of doctrine, or rather doctrinal matters, were called “darts,” “shafts,” and “arrows,” is further evident in David:

The sons of Ephraim, being armed, shooters of the bow, turned back in the day of battle (Psalms 78:9).

In some places in the Word, an arrow can also have a negative meaning -- where it is falsity destroying truth, and a bow is the doctrine from falsity. A really good source to check here is Apocalypse Explained 357, stating in subsection 12 (in some translations).

(Odkazy: Isaiah 7:24)