2213. 'About this time next year, and Sarah will have a son' means that the Lord would at that point cast off the human rational and put on the Divine Rational. This is clear from the meaning of 'returning at this time of life', or 'at this time next year', as the joining together of the Divine with the Lord's Human, dealt with above in 2193, and from the meaning of 'Sarah's having a son' as the Rational that was to be Divine, also dealt with above, in 2194. 'This time of life', or 'this time next year', denotes the time when Abraham would be entering his hundredth year, which year means when the Lord's Human had become united to the Divine, and the Divine to the Human, as shown above in 1988. There was an interval of a year because 'a year' in the Word does not mean a year but an entire length of time, thus a whole period, whether of a thousand years, or of a hundred, or of ten, or of hours, as also shown already, in 482, 487, 488, 493, 893; and the same applies to a week, dealt with in 2044.

493. There is no need to pause too long over the consideration that 'days' and 'years mean periods of time and states. Only this need be stated here, that in the world periods of time and measurements to which numbers may be applied are indispensable, for they belong within the ultimate realms of nature. But whenever such application occurs, the numbers of days and years, and also the numbers applied to measurements, mean something which is completely different from periods of time or from measurements, and which is determined by the meaning of the number used, as in the statements about there being six days for work, and the seventh being holy, which are dealt with above; in the statement about a jubilee having to be announced every forty-ninth year and celebrated in the fiftieth; about the tribes of Israel being twelve, the same number as the Lord's Apostles; and about there being seventy elders, the same number as the Lord's disciples. And there are many other examples where the numbers mean some special characteristic completely different from the persons or objects to which they apply. And when completely separated one from the other the states meant by the numbers are then left.