The disciples of Jesus were terrified when they saw him walking on water. But he spoke to their fears, telling them to be courageous, not fearful. Notice the short phrase in the middle of the above verse—“It is I.”
Earlier, Jesus had amazed his disciples with his ability to calm the raging winds and waves on the lake by merely speaking to them (Matthew 8:23-27). Now, he further exhibits his control over nature by actually walking on water! His powerful presence was all that was needed to drive away their fears.
It is the presence of Jesus that allows us to be courageous and fearless. We who follow him have witnessed his power and control. We trust him to see us through even the fiercest of life’s storms. When life gets scary, look to Jesus. He is the source of our courage.