99. And that thou canst not bear the evil, signifies that they reject evils. This is evident from the signification of "canst not bear," as being to reject, for what a man cannot bear he rejects. "The evil" signify evils, because the thought of angels is abstracted from persons; when, therefore, in the sense of the letter of the Word "the evil" are mentioned, angels think of evils; for by "the evil," men who are evil, thus persons, are meant. The thought of angels is of this character because they are in heavenly wisdom, and that wisdom has extension into the universal heaven; if therefore they should think with thought determined to persons, that extension would perish, and their wisdom with it. In this way the spiritual differs from the natural. This is why "the evil" signify evils. (Of the wisdom of the angels, that it is extended into the universal heaven because their thought is abstracted from space, time, and matter, see in the work on Heaven and Hell, n. 169, 191-199, 265-275; and that their thought is abstracted from persons, see Arcana Coelestia 8343, 8985, 9007)

In general, mothers in the Bible represent the Lord's church on earth. In some cases "mother" more specifically refers to the truth of the church, the true teachings the church has about the Lord and about life. This makes sense if you think about it. Mothers are the vehicles through which new people are created; the church (in a broad sense) is the vehicle through which new ideas about the Lord and new good actions are created. And just as a mother is filled with love -- for her children and husband -- so also is the church filled with love, both for its ideas and uses and also for the Lord.