Не тот глухой, кто глух, а тот, кто не желает слышать

People will not listen to what they are stubbornly determined not to. See Хуже всякого слепого, кто не хочет видеть (X)

Var.: Хуже всякого глухого, кто не хочет слышать

Cf: No ear is so deaf as one which wishes not to hear (Am.). None so deaf as he who won't hear (Am.). None so deaf as those who won't hear (Am., Br.). There's none so deaf as they (those) who won't listen (Br.)