487. 'Days means periods of time and states in general. This has been shown in Chapter 1, where the 'days of creation' have no other meaning. In the Word it is very common for a whole period of time to be called 'a day', as it clearly is in the present verse and in verses 5, 8, 11, 14, 17, 20, 23, 27, 31, below; and therefore the states that belong to periods of time in general are meant by 'days' as well. And when 'years' is attached, then periods of years mean the natures of those states, and so the states in particular.

[2] The most ancient people had their own particular numbers which they would use to mean different aspects of the Church - for instance, the numbers three, seven, ten, twelve, and many which they obtained from these and other numbers - and in so doing incorporated states of the Church. These numbers therefore contain arcana that would require considerable effort to unravel. Really a number was an evaluation of the states of the Church. The same feature occurs throughout the Word, especially in the prophetical. And the religious ceremonies of the Jewish Church also entail numbers specifying periods of time as well as quantities; for example, in connection with sacrifices, minchahs, oblations, and other practices, which in every case have special reference to holy things. Consequently eight hundred in this verse, nine hundred and thirty in the next, and the numbers of years mentioned in the verses that follow after that, embody in particular more matters than can possibly be retold; matters, that is to say, which have to do with changes in the state of their Church in relationship to their own general state. Later on, in the Lord's Divine mercy, the meaning of the simple numbers up to twelve will be given, for without knowing these first of all no one can grasp what compound numbers mean.

916. 21:21 The twelve gates were twelve pearls: each gate was of one pearl. This symbolically means that an acknowledgment and concept of the Lord join all the concepts of truth and goodness in the Word into one and introduce into the church.

The twelve gates symbolize in sum the concepts of truth and goodness by which a person is introduced into the church (nos. 899, 900). Twelve pearls also symbolize in sum concepts of truth and goodness (no. 727). That is why the gates were pearls. Each gate was of one pearl because all the concepts of truth and goodness symbolized by the gates and by pearls relate to a single concept, one that is their containing vessel, and that single concept is a concept of the Lord. We say, a single concept, even though there are many that make up that single concept, for a concept of the Lord pervades all other doctrinal concepts, and so all concerns having to do with the church. All matters of worship take their life and soul from that concept, for the Lord is everything in the whole of heaven and the church, and so in the whole of worship.

[2] An acknowledgment and concept of the Lord join all the concepts of truth and goodness in the Word into one because all spiritual truths are connected, and if you would believe it, their connection is like the connection between all the members, viscera and organs of the human body. Consequently, as the soul holds everything together in their organization and connection, so that they are sensed only as a unit, so the Lord holds together all the spiritual truths that a person possesses.

That the Lord is the true door by which one is to enter into the church and so into heaven, He Himself teaches in John:

I am the door. If anyone enters by Me, he will be saved... (John 10:9)

And that an acknowledgement and concept of Him is the true pearl is meant by these words of the Lord in Matthew:

...the kingdom of heaven is like a merchant seeking beautiful pearls, who, when he had found one precious pearl, went and sold all that he had and bought it. (Matthew 13:45-46)

The one precious pearl is an acknowledgment and concept of the Lord.