there are none so blind as those who will not see

US /ðer ɑːr ˈnʌn soʊ ˌblaɪnd æz ðoʊz huː wɪl nɑːt ˌsiː/
"there are none so blind as those who will not see" picture
1.

見ようとしない者ほど盲目なものはない