In Genesis 11:1, in the phrase 'the whole earth was of one lip' means that people everywhere held to the same doctrine in its general aspects, 'lip' meaning doctrine, 'the earth' the Church. (Arcana Coelestia 1284)

In Isaiah 6:5, 7, this stands for our inner capacities and so for inward worship. (Arcana Coelestia 1286)

2031. Verse 9 And God said to Abraham, And you shall keep My covenant, you and your seed after you throughout their generations.

'God said to Abraham' means perception. 'And you shall keep My covenant' means an even closer union. 'You and your seed after you' means that from Him there is a conjunction of all who have faith in Him. 'Throughout their generations' means the things that comprise faith.