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)

1284. Verse 1 And the whole earth was of one lip, and its words were one.

'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. 'And its words were one' means that they held to the same doctrine in its particular details.