Meaning of the word "conscience makes cowards of us all" in English

What does "conscience makes cowards of us all" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

conscience makes cowards of us all

US /ˈkɑːn.ʃəns meɪks ˈkaʊ.ɚdz əv ʌs ɑːl/
UK /ˈkɒn.ʃəns meɪks ˈkaʊ.ədz əv ʌs ɔːl/
"conscience makes cowards of us all" picture

Idiom

the idea that a person's moral sense of right and wrong can make them hesitate or feel afraid to take action, especially when that action might be risky or immoral

Example:
He wanted to take the money, but conscience makes cowards of us all, and he couldn't go through with it.
I was going to lie to cover for him, but then I realized conscience makes cowards of us all.