None so deaf as those who will not hear

Meaning: Nobody is deafer than the person who decides he does not want to listen. Often used in reference to prejudice and intolerance.

Note: none (pronoun) = no person; no one | deaf (adj.) = unable to hear; not having the power of hearing | will (verb) = intend; desire [this is “will” used as a main verb, not as a modal auxiliary verb] | Also found as: “There are none so deaf as those who will not hear.” There is a similar proverb: “None so blind as those who will not see.”

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via None so deaf as those who will not hear | EnglishClub.