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.
2 Corinthians 11:24-27
24
Five times from the Jews I received forty stripes minus one.
25
Three times I was beaten with rods. Once I was stoned. Three times I suffered shipwreck. I have been a night and a day in the deep.
26
I have been in travels often, perils of rivers, perils of robbers, perils from my countrymen, perils from the Gentiles, perils in the city, perils in the wilderness, perils in the sea, perils among false brothers;
27
in labor and travail, in watchings often, in hunger and thirst, in fastings often, and in cold and nakedness.