Meaning of the word "a good example is the best sermon" in English

What does "a good example is the best sermon" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a good example is the best sermon

US /ə ɡʊd ɪɡˈzæmpəl ɪz ðə bɛst ˈsɜrmən/
UK /ə ɡʊd ɪɡˈzɑːmpəl ɪz ðə bɛst ˈsɜːmən/
"a good example is the best sermon" picture

Idiom

giving a good example is a better way to influence people than just giving them advice

Example:
Instead of lecturing your children about honesty, just be honest yourself; a good example is the best sermon.
The manager showed us how to handle the crisis by staying calm, proving that a good example is the best sermon.