Keeping your eyes on God

Why is it during some difficult times we seem to take our eyes of God? The One who keeps the universe in order, the One who has given us life. Why did Peter take his eyes off Jesus when he was walking on the water? Like Peter I am so thankful for that loving hand that reaches out to me when I am falling and calling out His name. I truly serve an amazing God. I am so thankful for His mercy, grace and unconditional LOVE.