Meaning of the word "men are blind in their own cause" in English

What does "men are blind in their own cause" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

men are blind in their own cause

US /mɛn ɑːr blaɪnd ɪn ðɛr oʊn kɔːz/
UK /mɛn ɑː blaɪnd ɪn ðeə rəʊn kɔːz/
"men are blind in their own cause" picture

Idiom

people are unable to judge their own situations or actions impartially

Example:
He couldn't see his own mistakes, proving that men are blind in their own cause.
It's hard to be objective about your own business; men are blind in their own cause.