The number "two" has two different meanings in the Bible. In most cases "two" indicates a joining together or unification. This is easy to see if we consider the conflicts we tend to have between our "hearts" and our "heads" -- between what we want and what we know. Our "hearts" tell us that we want pie with ice cream for dinner; our "heads" tell us we should have grilled chicken and salad. If we can bring those two together and actually want what's good for us, we'll be pretty happy. We're built that way -- with our emotions balanced against our intellect -- because the Lord is built that way. His essence is love itself, or Divine Love, the source of all caring, emotion and energy. It is expressed as Divine Wisdom, which gives form to that love and puts it to work, and is the source of all knowledge and reasoning. In His case the two aspects are always in conjunction, always in harmony. It's easy also to see how that duality is reflected throughout creation: plants and animals, food and drink, silver and gold. Most importantly, it's reflected in the two genders, with women representing love and men representing wisdom. That's the underlying reason why conjunction in marriage is such a holy thing. So when "two" is used in the Bible to indicate some sort of pairing or unity, it means a joining together. In rare cases, however, "two" is used more purely as a number. In these cases it stands for a profane or unholy state that comes before a holy one. This is because "three" represents a state of holiness and completion (Jesus, for instance, rose from the tomb on the third day), and "two" represents the state just before it.

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)