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.

6296. 'But truly his younger brother will become greater than he' means that good from truth, thus the spiritual man, will receive even greater increase. This is clear from the representation of Ephraim, to whom 'younger brother' refers here, as truth that belongs to the understanding within the natural and is born from the internal, dealt with in 6234, 6238, 6267, though 'Ephraim' at this point is good from truth, dealt with below; and from the meaning of 'becoming greater than another' as receiving even greater increase. The reason why here 'Ephraim' is good from truth is that he represents the member of the spiritual Church - the member of the external spiritual Church, to be exact - just as 'Manasseh' represents the member of the external celestial Church, 6295. What makes someone a member of the spiritual Church is good from truth - the internal part of that Church being what 'Israel' represents, the external what 'Ephraim' represents. A member of the spiritual Church differs from a member of the celestial in the fact that the spiritual member's good has been implanted in the understanding part of his mind, whereas the celestial member's has been implanted in the will part, see 863, 875, 895, 927, 928, 1023, 1043, 1044, 2256, 4328, 4493, 5117. This difference goes to explain why 'Ephraim' represents the spiritual man, and 'Manasseh' the celestial man.

[2] The reason why good from truth, or the spiritual man, will receive greater increase than good which gives rise to truth, which is the celestial man, is that the human will has been unceasingly corrupted, so corrupted that at length evil has taken complete possession of it, with the result that nothing sound has remained there. So that a person is not destroyed on account of this the Lord has seen to it that the understanding part of his mind may be regenerated and that he may thereby be saved. This now explains why there are few who still have any soundness in the will part of their mind, thus why there are few who can become celestial people but many who can become spiritual ones; and this in turn explains why those who are spiritual will receive greater increase than those who are celestial. This then is the meaning of 'his younger brother will become greater than he'.