to see or not to see

Thou blind fool, Love, what dost thou to mine eyes
That they behold and see not what they see?
They know what beauty is, see where it lies,
Yet what the best is, take the worst to be.
If eyes corrupt by overpartial looks,
Be anchored in the bay where all men ride,
Why of eyes' falsehood hast thou forgèd hooks,
Whereto the judgment of my heart is tied?
Why should my heart think that a several plot
Which my heart knows the wide world's common place?
Or mine eyes seeing this, say this is not
To put fair truth upon so foul a face?
In things right true my heart and eyes have erred,
And to this false plague are they now transferred.

   −William Shakespeare (Sonnet 137)