883. 'The dove returned to him at evening time' means that these started to show themselves a little; and 'evening time' is similar to pre-morning twilight. This in like manner becomes clear from that has been stated already at verse 8, and also from the fact that here it is called 'evening time'. Concerning 'evening', see what has been stated in Genesis 1, where six times the statement is made 'there was evening and there was morning'. 'Evening' is a word that has to do with regeneration and indeed with that state when a person is still in near-darkness, or when there is still only a tiny quantity of light showing itself to him. Morning itself is described in verse 13 below by 'he removed the roof from the ark and saw out'. Because 'evening' meant the pre-morning twilight, mention of the evening is made so many times in the Jewish Church. This also is why sabbaths and festivals began from evening onwards, and why Aaron was commanded to light the sacred lamp 'in the evening', Exodus 27:21.

5194. 'And it happened at the end of two years of days' means after the state when the joining together took place, that is to say, when the powers of the senses belonging to the exterior natural and those belonging to the interior natural were joined together, both of which powers are dealt with in the previous chapter. This is clear from the meaning of 'two years of days', that is, a period of two years, as a state involving a joining together; for 'two' means a joining together, 1686, 3519, while 'years' means states, as does 'days'. For the meaning of years' as states, see 487, 488, 493, 893, and for that of 'days', 27, 487, 488, 497, 2788, 3462, 3785, 4850. The reason 'two' means a joining together is that every single thing in the spiritual world, and consequently in the natural world, has two forces associated with it - goodness and truth. Good is an active inflowing force, truth a passive, recipient one. Also, because everything has these two forces associated with it, and because nothing can ever be brought forth unless the two are made one by becoming so to speak married to each other, a joining together is therefore meant by them.

[2] This type of marriage exists in every single thing within the natural order and its three kingdoms; without it nothing whatever can come into existence. For anything to come into existence within the natural order there needs to be heat and light, heat in the natural world corresponding to the good of love in the spiritual world, and light corresponding to the truth of faith. These two - heat and light - must act as one if anything is to be brought forth. If they do not act as one, as is the case in winter-time, nothing at all is brought forth. The same holds true on a spiritual level, as is quite evident with the human being, who has two mental powers - will and understanding. The will has been formed so that it may receive spiritual heat, that is, the good of love and charity, while the understanding has been formed so that it may receive spiritual light, that is, the truth of faith. Unless these two residing with a person make one nothing is brought forth, for the good of love devoid of the truth of faith cannot give definition and particular character to anything, while the truth of faith devoid of the good of love cannot bring anything into effect. So that the heavenly marriage may exist in a person therefore, or rather so that a person may be in the heavenly marriage, those two entities must make one in him. This explains why the ancients likened every single thing in the world, and every single thing within the human being, to a marriage, 54, 55, 568, 718, 747, 917, 1432, 2173, 2516, 2731, 2739, 2758, 3132, 4434, 4875, 5138. From all this one may see why it is that 'two' means a joining together.