Even if a fool lived with a wise man all his life, he would still not recognise the truth, like a wooden spoon cannot recognise the flavour of the soup.
It is sure to be dark if you shut your eyes.
Half of us are blind, few of us feel, and we are all deaf.
And people with obsessions, reflected Bond, were blind to danger.
...in consequence of the film of familiarity and selfish solicitude, we have eyes yet see not, ears that hear not, and hearts that neither feel nor understand.
I gasped and pointed the way. I gave you an adventure, Ed, right in front of you but you never saw it until I showed you, and that's why we broke up.
We deny the severity of our loved one's problem not because we are naive, but because we can't know.
I'm rather shocked by what I thought was simple mindedness actually. I thought they're not looking, they're not actually looking.
My! ain't men blinder'n moles?
No creature smarts so little as a fool.
So, blind to Someone I must be.
In our wide world there is but one altogether fatal personage, the dunce,--he that speaks irrationally, that sees not, and yet thinks he sees.