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

US /jʌŋ men ˌθɪŋk oʊld men ɑːr ˈfuːlz bət oʊld men ˌnoʊ jʌŋ men/
"young men think old men are fools, but old men know young men" picture
1.

Los jóvenes piensan que los viejos son tontos, pero los viejos conocen a los jóvenes.