Meaning of the word "he that would eat the kernel must crack the nut" in English

What does "he that would eat the kernel must crack the nut" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

he that would eat the kernel must crack the nut

US /hi ðæt wʊd iːt ðə ˈkɜːrnəl mʌst kræk ðə nʌt/
UK /hiː ðæt wʊd iːt ðə ˈkɜːnəl mʌst kræk ðə nʌt/
"he that would eat the kernel must crack the nut" picture

Idiom

one must work hard or overcome difficulties in order to achieve something worthwhile

Example:
If you want to become a doctor, remember that he that would eat the kernel must crack the nut.
The training is difficult, but he that would eat the kernel must crack the nut.