3090. 'And she said, Drink, my lord' means an affirmative response. This is clear from the agreement or consent. What the affirmative response by truth is when it is to be joined to good is evident from marriages, for the basis of any marriage is the consent given by both parties. This has its origin in the marriage of good and truth, in that one party - good - proposes and the other - truth - consents, and the two are thereby joined together. Although this marrying of good and truth is not seen in a person while he is being regenerated, that is, while he is entering into the heavenly marriage, it is nevertheless taking place. This is quite evident from the consideration that while a person is being regenerated a kind of marriage must take place between the will and the understanding, good being on the side of the will, truth on that of the understanding. For this reason the ancients established a marriage between will and understanding, and between the individual parts of the will and the understanding, 54, 55.

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.