"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 !"
The main context of this message is about faith (or lack of) in the Lord Jesus, but this event can also represent something else. Most people are creatures of habit, and most have a comfort zone that they do not like to get out of. Our comfort zone can be a real hindrance to becoming a true disciple of Jesus, and to truly following and obeying Him. Let's say the boat in these verses represents our comfort zone. If you want to go to where Jesus is and to join Him in the work He is doing you will need to leave the boat - your comfort zone. If you are not willing to do this, you will miss the opportunity to join Him in His work, and you will miss the opportunity to see the Lord do great things and show who He is. The disciples saw Jesus for who He really is - the One True God with power and authority over all, and in verse 33 it says they worshipped Him.
So what is hindering you from joining God in His work and seeing Him for who He really is ? A fear of witnessing ? A fear or an unwillingness to try new things ? Tradition ? A lack of faith ? A stubborn refusal to adjust your will to His ? An unwillingness to move away from family or friends, if the Lord so leads ? An unwillingness to move to another country, if God so leads ? Unless you are willing to get out of your "boat" you will miss the Lord and what He is doing, and you will not grow in your knowledge of Him.