Meaning of the word "a friend's frown is better than a fool's smile" in English

What does "a friend's frown is better than a fool's smile" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a friend's frown is better than a fool's smile

US /ə frɛndz fraʊn ɪz ˈbɛtər ðæn ə fuːlz smaɪl/
UK /ə frɛndz fraʊn ɪz ˈbɛtə ðæn ə fuːlz smaɪl/
"a friend's frown is better than a fool's smile" picture

Idiom

it is better to have a friend who is honest and critical than a foolish person who flatters you with insincere praise

Example:
I know his critique was harsh, but remember that a friend's frown is better than a fool's smile.
She told me the truth even though it hurt, proving that a friend's frown is better than a fool's smile.