Meaning of the word "an honest man's pillow is his peace of mind" in English

What does "an honest man's pillow is his peace of mind" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

an honest man's pillow is his peace of mind

US /æn ˈɑːnɪst mænz ˈpɪloʊ ɪz hɪz piːs əv maɪnd/
UK /æn ˈɒnɪst mænz ˈpɪləʊ ɪz hɪz piːs əv maɪnd/
"an honest man's pillow is his peace of mind" picture

Idiom

a person who is honest and has a clear conscience can sleep well and live without worry

Example:
He doesn't have much money, but he sleeps soundly because an honest man's pillow is his peace of mind.
I refused the bribe because I value my sleep; an honest man's pillow is his peace of mind.