fools rush in where angels fear to tread
Proverb meaning that ignorance of danger leads to fearlessness. Literally 'the blind don't fear snakes'. Contains the sensitive word 盲 (blindness), so use with care.
As the saying goes, 'fools rush in where angels fear to tread'; he approached without fear, unaware of the danger.
The proverb pictures a blind snake that does not fear what it cannot see, figuratively describing someone who acts boldly through ignorance of danger.