Meaning of the word "a clean conscience makes a soft pillow" in English

What does "a clean conscience makes a soft pillow" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a clean conscience makes a soft pillow

US /ə klin ˈkɑnʃəns meɪks ə sɔft ˈpɪloʊ/
UK /ə kliːn ˈkɒnʃəns meɪks ə sɒft ˈpɪləʊ/
"a clean conscience makes a soft pillow" picture

Idiom

a person who has done nothing wrong or has no guilt can sleep soundly and peacefully

Example:
He slept like a baby after returning the lost wallet, proving that a clean conscience makes a soft pillow.
I don't worry about the rumors because a clean conscience makes a soft pillow.