Arcana Coelestia #7547
7547. 'And you would be cut off from the earth' means that thus there would be no communication any longer through things of the Church. This is clear from the meaning of 'being cut off', when said of things of the Church, as being separated, and when they are separated - that is, when there is no longer any communication or contact with heaven through those things of the Church - that person sinks into hell, which is 'being cut off', see above in 7545; and from the meaning of 'the earth' as the Church, dealt with in 662, 1067, 1262, 1733, 1850, 2117, 2118 (end), 2571, 2928, 3355, 4535, 4447, 5577.
Isaiah 10:20-23
20
It will come to pass in that day that the remnant of Israel, and those who have escaped from the house of Jacob will no more again lean on him who struck them, but shall lean on Yahweh, the Holy One of Israel, in truth.
21
A remnant will return, even the remnant of Jacob, to the mighty God.
22
For though your people, Israel, are like the sand of the sea, only a remnant of them will return. A destruction is determined, overflowing with righteousness.
23
For the Lord, Yahweh of Armies, will make a full end, and that determined, in the midst of all the earth.