There's none so deaf as those who will not hear

There's none so deaf as those who will not hear.

Prov. If you tell someone something that he or she does not want to know, he or she will not pay attention to you. I tried repeatedly to tell my supervisor about the low morale in our department, but there's none so deaf as those who will not hear.See also: deaf, hear, none, not, those, who, will