Overview
The concept of flint in Scripture symbolizes stubbornness and hardness of heart. Isaiah uses flint imagery to describe determination in following God, while other passages warn against becoming like flint—resistant to conviction and God's truth. A 'flint return' warns believers against returning to spiritual hardness after experiencing God's grace.
Key Scriptures
"I have set my face like a flint, and I know that I shall not be put to shame" (Isaiah 50:7, ESV). "And they refused to obey and were not mindful of the wonders that you performed among them, but they stiffened their neck and appointed a leader to return to their slavery" (Nehemiah 9:17, ESV). "As the Holy Spirit says, 'Today, if you hear his voice, do not harden your hearts as in the rebellion'" (Hebrews 3:7-8, ESV).
Application
Examine your heart regularly for signs of spiritual hardness, and respond immediately to the Holy Spirit's conviction rather than allowing repeated resistance to create a hardened conscience.