674. It has been shown already in 40 that 'birds' means intellectual or rational concepts, and in 45, 46, 142, 143, 146, that 'beasts' means desires of the will, or affections. That 'creeping thing of the ground' means the lowest things of each of these may be evident to anyone from the consideration that what creeps along the ground is the lowest of all. That 'pairs of all shall enter in to keep them alive' means the regeneration of those things was stated in the previous verse.