Eyes
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.
Isaiah 6:9-11
9
He said, "Go, and tell this people, 'You hear indeed, but don't understand; and you see indeed, but don't perceive.'
10
Make the heart of this people fat. Make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and turn again, and be healed."
11
Then I said, "Lord, how long?" He answered, "Until cities are waste without inhabitant, and houses without man, and the land becomes utterly waste,