Meaning of the word "calamity is man's true touchstone" in English

What does "calamity is man's true touchstone" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

calamity is man's true touchstone

US /kəˈlæm.ə.ti ɪz mænz truː ˈtʌtʃ.stoʊn/
UK /kəˈlæm.ɪ.ti ɪz mænz truː ˈtʌtʃ.stəʊn/
"calamity is man's true touchstone" picture

Idiom

a proverb meaning that difficult times or disasters reveal a person's true character and strength

Example:
He remained calm and led the team during the crisis, proving that calamity is man's true touchstone.
We only saw his bravery when the business failed; truly, calamity is man's true touchstone.