What does Romans 10:21 mean?
Romans 10 concludes with this poignant verse. Paul's quotation of Isaiah 65:2 here follows his reference to Isaiah 65:1 in the previous verse. God describes Himself as patiently holding out His hands to welcome His people Israel once they turn around and come back to Him. God describes Israel as a disobedient and contrary people.Their disobedience at this moment in history was not like the disobedience described in Isaiah 65. That disobedience included directly breaking God's commands in the law. The disobedience Paul describes now, though, is a refusal to obey the gospel of Jesus (Romans 10:16).
Faith in Christ is more than an opportunity to be declared righteous by God. It is His command. Israel said no. This, in fact, is the root cause of all unbelief: a deliberate choice to disobey, reject, or ignore what God has told us (Romans 1:18–20; John 5:39–40; John 7:17).
Still, as this verse says, God is waiting. Paul's prayer for Israel was that her people would turn, repent, and believe (Romans 10:1).