'To be in prison,' as in Revelation 2:10, signifies being infested by evils from hell, because this is like being bound in prison, because they cannot think anything but evil, even though their will is for good. From this, combat and interior anxiety follow.

(Odkazy: Apocalypse Revealed 99)

99. "'Behold, the devil is about to throw some of you into prison.'" This symbolically means that their goodness of life will be infested by evils emanating from hell.

Being thrown into prison by the devil has this symbolic meaning because the devil means a hell that is inhabited by people caught up in evils, and so abstractly the evil that exists there and that emanates from there (no. 97).

To be thrown into prison is to be infested, because people who are infested by evils from hell are as though bound in prison, for they cannot help but meditate evil, even if they will good. This gives rise to an inner combat and distress from which they cannot be set free, almost like people in chains. That is because their good is not good as long as it is bound up with falsities; and to the extent that it is bound up with falsities, evil is present in it. This good is accordingly what is infested.

[2] This infestation, however, occurs not in the natural world, but in the spiritual world, thus after death. I have often been granted to see the infestations of people there. They lament, saying that they have done good, and wish to continue doing good, and yet are unable to now because of the evils surrounding them.

Not all, however, are infested alike. They are infested more or less severely in the measure that they have confirmed themselves in falsities. We are accordingly told that the devil will throw "some of you" into prison. Confirmation of falsity is harmful, as may be seen in The Doctrine of the New Jerusalem Regarding the Sacred Scripture, nos. 91-97.

[3] "The bound" in the Word have the same symbolic meaning as those thrown into prison here, as in the following passages:

...I will give You as a covenant to the people..., to bring out the bound from the prison, (and) those who sit in darkness from the house of confinement. (Isaiah 42:6-7, cf. 49:8-9)

(Jehovah) has sent Me... to proclaim liberty to the captives, and... to those who are bound. (Isaiah 61:1)

By the blood of your covenant I will set free your bound ones from the pit. (Zechariah 9:11)

God... has brought out those who are bound with fetters. (Psalms 68:6)

The groaning of the bound will come before You. (Psalms 79:11)

To hear the groaning of the bound, to let loose those consigned to death. (Psalms 102:20)

Jehovah (who) sets the bound free. (Psalms 146:7)

It is apparent that the bound in these places do not mean people in bonds in the world, but people bound by hell, thus by evils and falsities.

The following words of the Lord have the same symbolic meaning:

I was... in prison and you did not visit Me. (Matthew 25:43)

Since the Lord brings out of prison or liberates from infestation people who as to life were engaged in good, even if as to doctrine they were caught up in falsities, therefore He says, "Do not fear any of those things which you are about to suffer," and, "Be faithful..., and I will give you the crown of life."