It's common to say “I see” when we understand something. And indeed, “seeing” in the Bible represents grasping and understanding spiritual things. So it makes sense that the eyes, which allow us to see, represent the intellect, which allows us to understand spiritual things. This can also be used in the negative, of course; the Bible speaks of people having eyes and refusing to see, and the Lord when He was in the world advised plucking out an offending eye. These represent a refusal to acknowledge truth, or being misled by falsity.

659. Verse 17 And I, behold, I am bringing a flood of waters over the earth, to destroy all flesh in which there is the spirit of life ¹ from under the heavens; everything that is on earth will breathe its last.

'A flood' means a deluge of evil and falsity. 'To destroy all flesh in which there is the spirit of life' from under the heavens' means that all the descendants of the Most Ancient Church would destroy themselves. 'Everything that is on the earth will breathe its last' means those belonging to that Church who had become such.

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