Arcana Coelestia #670
670. That 'living creature' 1 means things of the understanding, and 'all flesh' those of the will, becomes clear from what has been stated already, and also from what follows. In the Word 'living creature' means all animal life in general, as in Genesis 1:10, 21, 24; 2:19. Here however, because the phrase 'all flesh' is added immediately after, it means things which belong to the understanding, for the reason given already, that the regeneration of the member of this Church had to begin in the things of the understanding. This also is why in the next verse 'birds' are mentioned first, which mean things of the understanding or the rational, and 'beasts', which are those of the will, second. 'Flesh' in particular means bodily-mindedness which is a feature of the will.
Footnotes:
1. literally, living soul
Arcana Coelestia #636
636. 'I will destroy them together with the earth' means that the human race would perish together with the Church. This is clear from the fact that here the phrase 'together with the earth' is used. In fact, as previously stated, 'earth' in a broad sense means love and so the celestial things of the Church. Here because no love, nor anything celestial, was left it means self-love and that which is contrary to the celestial aspect of the Church. Despite this the member of the Church still existed because he possessed doctrinal matters concerning faith. For as has been stated, love includes faith within itself, and faith includes cognitions of faith, just as the earth includes the ground, and the ground includes the field.