Faith is a beautiful word! Sometimes when life throws us a curve ball it is difficult to keep the faith. Even Peter who walked with Jesus, 'took his eye off the ball'! Notice in the scripture that Peter did not begin to 'sink' UNTIL he took his eyes off of Jesus and began to look around at the circumstances he was in! That is a lesson we need to all Learn!!
During the fourth watch of the night Jesus went out to them, walking on the lake. When the disciples saw him walking on the lake, they were terrified. "It's a ghost," they said, and cried out in fear. But Jesus immediately said to them: "Take courage! It is I. Don't be afraid." "Lord, if it's you," Peter replied, "tell me to come to you on the water." "Come," he said. Then Peter got down out of the boat, walked on the water and came toward Jesus. But when he saw the wind, he was afraid and, beginning to sink, cried out, "Lord, save me!"
- Matthew 14:22-30