3845. 'Complete this week' means the continuance of the diligent effort. This is clear from the meaning of 'completing' here as serving or completing by serving, and so as meaning diligent effort, dealt with in 3824; and from the meaning of 'a week' as a state and also a whole period, dealt with in 728, 2044, in this case therefore the state and the subsequent period, and so a continuance. What has been said in 3814 about the meaning of 'a month' applies equally to the meaning of 'a week'. When used in the singular 'week' means the end of some previous state and the beginning of the one that follows it, and so a new state; and by the completing of this is meant from its beginning to its end. The reason why 'a week', like every other time-measurement specifically, means a state and also a period of time is that all states also have their own individual periods of the beginning, the continuance, and the end. In the next life however these are not perceived as periods of time but as states and their integral cycles. Here it is quite evident what 'a week' meant to the ancients, namely - in the proper sense - every period that was divided into seven phases, whether it was a period of seven days or of seven years or of seven ages, and so whether it was a long period or a short one. Here it is plainly a period of seven years. And because 'seven' with those people meant that which was holy, see 84-87, 395, 433, 716, 881, 'a week' therefore meant a holy period, and also the holiness of a period.

395. 'Anyone killing Cain, vengeance will be taken on him sevenfold' means that to violate faith thus separated was utterly forbidden. This is clear from the meaning of 'Cain' as separated faith, and from the meaning of 'seven' as utterly inviolable. As is well known, the number seven was considered holy on account of the six days of creation and of the seventh, which is the celestial man in whom peace, rest, and the Sabbath exist. This is the reason why the number seven occurs so many times in the religious ceremonies of the Jewish Church, in every instance standing for that which is holy. It is also the reason why periods of time, long as well as short, were divided into seven, and were called weeks, as in the case of the long time intervals leading up to the time when the Messiah was to come, Daniel 9:24-25. A period of seven years is also called a week by Laban and Jacob, Genesis 29:27-28. Consequently wherever the number seven occurs it stands either for something holy or else for something utterly inviolable, as in David,

Seven times in the day I praise You. Psalms 119:164.

In Isaiah,

The light of the moon will be as the light of the sun, and the light of the sun will be sevenfold, as the light of seven days. Isaiah 30:26.

Here 'the sun' is love, and 'the moon' faith deriving from love, a faith which is to be as love.

[2] Just as the periods of man's regeneration divide into six before he reaches the seventh, which is the celestial man, so also do the periods of vastation even until nothing celestial is left. This was represented by the many captivities of the Jews, and by the last of them, the Babylonian, which was a captivity of seven decades, that is, seventy years. And it was several times stated that the land had to rest during its Sabbaths. It was also represented by Nebuchadnezzar, of whom it is said in Daniel,

His heart will be changed from man, and the heart of a beast given him until seven times will pass over him. Daniel 4:16, 25, 32.

In reference to the vastation of the last times it is recorded in John,

I saw another sign in heaven, great and wonderful - seven angels holding the seven Revelation 15:1, 6-7.

They will trample over the holy city for forty-two months (that is, six times seven). Revelation 11:2.

In the same book,

I saw a book [written] within and on the back, sealed with seven seals. Revelation 5:1.

Severe and increased penalties were for the same reason expressed by the number seven, as in Moses,

If you will not obey Me in this matter, I will chastise you seven times worse for your sins. Leviticus 26:18, 21, 24, 28.

In David,

Return to our neighbours sevenfold into their bosom. Psalms 79:12.

So then, it is because it was utterly forbidden to violate faith - since it had a use to serve, as has been stated - that the statement is made about 'vengeance being taken sevenfold on him who killed Cain'.