Meaning of the word "young men think old men are fools, but old men know young men" in English

What does "young men think old men are fools, but old men know young men" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

young men think old men are fools, but old men know young men

US /jʌŋ mɛn θɪŋk oʊld mɛn ɑːr fuːlz, bʌt oʊld mɛn noʊ jʌŋ mɛn/
UK /jʌŋ mɛn θɪŋk əʊld mɛn ɑː fuːlz, bʌt əʊld mɛn nəʊ jʌŋ mɛn/
"young men think old men are fools, but old men know young men" picture

Idiom

a proverb suggesting that youth often underestimates the wisdom of age, while the elderly understand youth because they have experienced it themselves

Example:
He ignored his grandfather's advice, forgetting that young men think old men are fools, but old men know young men.
Don't be so arrogant; remember, young men think old men are fools, but old men know young men.