Arcana Coelestia #7636
7636. 'In order that you may know that I am Jehovah' means in order that it may thereby be made known to them that the Lord is the only God. This is clear from the meaning of 'in order that you may know' as in order that it may be made known to them. The reason why 'I am Jehovah' means that the Lord is the only God is that Jehovah means He Is, that is, the Source of the Being and Coming-into-Being (Esse et Existere) of all things, which must necessarily be unique and one. For the fact that 'Jehovah' is the Lord, see 1347, 1736, 2921, 3023, 3035, 5663, 6703, 6905, 6945, 6956; and for the fact that the words used here mean that He is the only God, 7401, 7444, 7544, 7598.
Arcana Coelestia #7598
7598. '[In order] that you may know that the earth is Jehovah's' means that from this it may be recognized that the Lord is the only God of the Church. This is clear from the meaning of 'knowing' as its being recognized; and from the meaning of 'the earth' as the Church, dealt with in 662, 1066, 1067, 1262, 1413, 1607, 1733, 1850, 4447, 4535, 5577 - 'Jehovah' being the Lord, see 1343, 1736, 2921, 3023, 3035, 5663, 6303, 6905, 6945, 6956. From this it is evident that 'the earth is Jehovah's' means that the Church is the Lord's, thus that the Lord is the only God of the Church, as in 7401, 7444, 7544.