486. Verse 4 And the days of Man after he beget Seth were eight hundred years; and he beget sons and daughters.

'Days' means periods of time and states in general. 'Years' means periods of time and states in particular. 'Sons and daughters' means the truths and goods that they perceived.

2074. That 'will one be born to a son of a hundred years?' means that in that case the Rational belonging to the Lord's Human Essence would be united to the Divine Essence is clear from the meaning of 'a hundred', regarding which see above, in 1988.