Meaning of the word "little birds that can sing and will not sing must be made to sing" in English

What does "little birds that can sing and will not sing must be made to sing" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

little birds that can sing and will not sing must be made to sing

US /ˈlɪtəl bɜrdz ðæt kæn sɪŋ ænd wɪl nɑt sɪŋ mʌst bi meɪd tu sɪŋ/
UK /ˈlɪtəl bɜːdz ðæt kæn sɪŋ ænd wɪl nɒt sɪŋ mʌst bi meɪd tu sɪŋ/
"little birds that can sing and will not sing must be made to sing" picture

Idiom

a proverb suggesting that those who have the ability to do something but refuse to do it should be pressured or forced to fulfill their duty

Example:
He has the talent to help us but refuses to cooperate; well, little birds that can sing and will not sing must be made to sing.
The witness is staying silent despite knowing the truth, but little birds that can sing and will not sing must be made to sing.