What does the Bible say about the stiff-necked people in Acts 7?

In Acts 7, Stephen addresses the council about the Israelites' history, emphasizing their consistent refusal to heed God's calls and their stubbornness toward His messages. He directly points out in verse 51 that they are 'stiff-necked and uncircumcised in heart and ears,' highlighting their resistance to the Holy Spirit just as their fathers did. This phrase underscores the spiritual condition of being unresponsive and hardened against God’s word, thus revealing the necessity of a transformed heart that only God can provide through regeneration.