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.

The face of the water (Genesis 1:2) signifies the knowledges of good and truth.

(References: Arcana Coelestia 19)