AC 6663 - the use of spiritual combats

AC 6663
Most spirits who come from the world and have lived the life of the Lord's commandments, before they can be uplifted into heaven and joined to societies there, are infested by the evils and falsities pertaining to them, to the end that they may be removed; for there are impurities which they have contracted in the life of the body that in no wise agree with heaven. The infestations take place by their being immersed in their evils and falsities; and while they are in them, spirits who are in like evils and falsities are present, and labor by every means to lead them away from truth and good.

But still they are not immersed so deeply in their evils and falsities that the influx through the angels from the Lord may not prevail; and the balance is maintained with exactness. The purpose of this is, that he who is infested may seem to himself to be in freedom, and thus to fight against the evils and falsities of himself, yet with the acknowledgment, if not at the time, yet afterward, that all the power of resisting was from the Lord. When this is being done, not only are the truths and goods strengthened which have been implanted before, but more are insinuated, this being the result of every spiritual combat in which the combatant is victorious.

This is still more perfectly the case with spiritual combats, because the combat takes place in the spirit, and concerns goods and truths; and especially because the Lord is present and leads by the angels; for the contest is concerning eternal life and salvation.

It is common in such combats for the Lord to turn into good all the evils which the hells intend; wherefore it is not permitted them to bring forth more or other evils than can be turned into good that is suited to him who is in combat. The reason of this originates in the fact that the Lord's kingdom is the kingdom of uses, and therefore nothing can be done there that is not a source of good.