8975. 'He shall serve for six years' means a state of labour and some conflict, and of consequent strengthening of truth. This is clear from the meaning of 'six years' as states of labour and conflict. For the meaning of 'six' as labour and conflict, see 737, 900, 8888, and 'years' as states, 487, 488, 493, 893, 7839. The reason why strengthening of truth is also meant is that spiritual truth, which is called the truth of faith, is strengthened through labour and conflict. The words 'some conflict' are used because those imbued with the truth of faith and not with complementary goodness of life are not allowed to experience any serious conflict, that is, temptation, since they would go under; for the Lord cannot flow in through good with them and so cannot protect them from the evils and falsities which attack in temptations. They are merely external people, and whatever flows in from the Lord must do so by way of the internal man into the external. When people are not imbued with the good of charity, the internal man does not lie open; for good is what opens the internal man, and is what dwells there.

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.