1335. That 'two years after the Flood' means the second Church after the Flood becomes clear from the fact that in the Word 'a year', as also 'a day' and 'a week', means an entire period, long or short, consisting of few or of many years. Indeed it means a period considered in the abstract, as may be seen from the places quoted already in 488, 893. The same applies here to 'two years after the Flood', which means the second period of the Church, which was when this second Ancient Church came into being.

In Genesis 11:4, this signifies the worship of self, which consists of a person exalting himself above others, even to the point of worship. This is why self-love, which is arrogance and pride, is called 'height,' 'loftiness,' and 'lifting up,' and is described with anything high. Self-love in worship, or the worship of self is called 'a tower,' because 'a city' signifies doctrine, and ancient cities were fortified with towers with guards. Towers were also built on the borders of a country. This is why they were called guard towers, or watchmen in 2 Kings 9:17, 17:9, 18:8, and watch-towers, in Isaiah 23:13.

In Matthew 21:33; Isaiah 5:2, this signifies interior truths into which there is influx, and communication with heaven. (Arcana Coelestia 918[4])

In Psalm 48:12, this signifies to consider the higher or interior things of that church. (Arcana Coelestia 453[10])

'To build a tower,' as in Luke 14:27, signifies acquiring interior truths.

(Odkazy: Arcana Coelestia 4599; Isaiah 25, 30, 30:25)