How does Christ's word empower believers?

The ministry of Jesus demonstrates that His word is powerful and effective for salvation. In Luke 5:4-5, despite Peter's doubts, he obeys Christ's command to let down his net. This illustrates that faith responds to Christ's word even when circumstances seem contrary. Our obedience and submission to His word result in spiritual fruitfulness. It's through proclaiming and believing the gospel that we see God work, encouraging us to preach with confidence, knowing that His word never returns void.