Significado da palavra "nothing comes out of the sack but what was in it" em português

O que significa "nothing comes out of the sack but what was in it" em inglês? Descubra o significado, a pronúncia e o uso específico desta palavra com a Lingoland

nothing comes out of the sack but what was in it

US /ˈnʌθ.ɪŋ kʌmz aʊt əv ðə sæk bʌt wʌt wəz ɪn ɪt/
UK /ˈnʌθ.ɪŋ kʌmz aʊt əv ðə sæk bʌt wɒt wəz ɪn ɪt/
"nothing comes out of the sack but what was in it" picture

Idioma

do saco só sai o que lá está dentro

you cannot get more out of something than what was originally put into it; a person's actions or words reflect their true character or knowledge

Exemplo:
He tried to sound like an expert, but nothing comes out of the sack but what was in it.
Ele tentou parecer um especialista, mas do saco só sai o que lá está dentro.
If you don't study, you can't expect to pass; nothing comes out of the sack but what was in it.
Se você não estudar, não pode esperar passar; do saco só sai o que lá está dentro.