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.

1028. For the plague thereof was exceeding great, signifies the total destruction of genuine truth. This is evident from the signification of "the plague of the hail," as being the falsification of the Word (as above); therefore "the plague thereof was exceeding great" signifies more grievous falsification, which is that the Word is falsified even to the destruction of all genuine truth. How the Word is falsified even to the destruction of genuine truth, and heaven is thereby closed against man, may be seen above (n. 719, 778, 888, 914, 916, 950).

(Continuation: The Commandments in general)

[2] It is said by some that he who sins against one commandment of the Decalogue sins also against the rest, thus that he who is guilty of one is guilty of all. It shall be told how far this is in harmony with the truth. When a man transgresses one commandment, by confirming with himself that it is not a sin, thus without fear of God, he commits it; because he has thus rejected the fear of God he does not fear to transgress the rest of the commandments, although he may not do this in act.

[3] For example, when one does not regard frauds and illicit gains, which in themselves are thefts, as sins, neither does he regard as a sin adultery with the wife of another, hating a man even to murder, lying about him, coveting his house and other things belonging to him; for when he rejects from his heart in any one commandment the fear of God he denies that anything is a sin; consequently he is in communion with those who in like manner transgress the other commandments. He is like an infernal spirit who is in a hell of thieves; and although he is not an adulterer, nor a murderer, nor a false witness, yet he is in communion with such, and can be persuaded by them to believe that such things are not evils, and can be led to do them. For he who has become an infernal spirit through the transgression of one commandment, no longer believes it to be a sin to do anything against God or anything against the neighbor.

[4] But the opposite is true of those who abstain from the evil forbidden in one commandment, and who shun and afterwards turn away from it as a sin against God. Because such fear God, they come into communion with the angels of heaven, and are led by the Lord to abstain from the evils forbidden in the other commandments and to shun them, and finally to turn away from them as sins; and if perchance they have sinned against them, yet they repent and thus by degrees are withdrawn from them.