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.

2227. That 'Abraham will certainly become a great and numerous nation' means that from the Lord will come all good, and from this all truth, is clear from the representation of 'Abraham' as the Lord, dealt with often above, and also from the meaning of 'nation' as good, dealt with in 1159, 1258-1260, 1416, 1849 - here 'a great and numerous nation', by which good and truth deriving from it are meant. That 'great' has reference to good and 'numerous' to truth may become clear from other places in the Word, but I must refrain from quoting them here. Truth derived from good is in the genuine sense spiritual good, for there are two kinds of good, quite distinct and separate from each other, namely celestial good and spiritual good. Celestial good is the manifestation of love to the Lord, spiritual good the manifestation of love towards the neighbour. From the former, that is, celestial good, flows the latter, that is, spiritual good; for no one is able to love the Lord unless he also loves the neighbour. Love to the Lord embraces love towards the neighbour, for love to the Lord originates in the Lord, thus in Love itself towards the whole human race. Abiding in love to the Lord is the same as abiding in the Lord, and one who abides in the Lord must inevitably abide in His love which is directed towards the human race, and thus towards the neighbour, so that in him both kinds of good are present - both celestial and spiritual. Celestial good is indeed good itself, but spiritual good is in fact truth that goes with or is derived from that celestial good. This truth, as stated, is spiritual good. It is celestial good that is meant by 'great', but spiritual good by 'numerous'.