There's none so blind as those who will not see

There's none so blind as those who will not see.

Prov. You cannot make someone pay attention to something that he or she does not want to notice. (Used often to upbraid someone for being unwilling to notice what you are trying call attention to.) Mother: This is the fifth time our daughter has been arrested for shoplifting. Don't you think we ought to seek some kind of help for her? Father: Our girl would never shoplift. I'm sure all those arrests were just some kind of mistake. Mother: There's none so blind as those who will not see. By October, it was obvious to everyone that Richard was coming in drunk every morning. Obvious, that is, except to his devoted secretary; there's none so blind as those who will not see.

See also: blind, none, see, those, who