“As it is said, “Today, if you hear his voice, do not harden your hearts” (Hebrews 3:15)

Hearing and listening are not the same. Our ears may hear a sound without tuning in to understand. But listening goes to the heart and produces understanding. This understanding at the heart level makes it possible to respond to God’s voice. What causes hard hearts? Hearing God’s voice without leaning in to understand and reply with obedience. This continual turning away instead of turning towards results in callused hearts and spiritual deafness.