But at your word I well follow it

Luke 5:1-11
Jesus is working among crowd but keep a little from crowd, because crowd do not know him.
Peter is a professional in fisherman, but he followed the words of Jesus, "But at your word I will let down the nets."
When they got a large number of fish, peter didn't rejoice but he fell down at Jesus' knees, saying, "Depart from me, for I am a sinful man, O Lord."
Jesus said to Simon, "Do not be afraid; from now on you will be catching men."
Why?
Do not come too close to the crowd, crowd are usually blind to their target. Keep my path on the way of God.
Our knowledge may lead us to wrong way and mind, follow the instruction of the Lord, it is the best way, His leading always is the best one to me. Pray to the Lord always.
Peter might has suspicion to the word of Jesus, but he likes to do and see it if follow the word of Jesus. When he saw the wonder results, his suspicion is to himself, but not to the Jesus.
Humble myself before the Lord, I am a sinful man either.
Under the gift of the Lord to us, we may use the gift for the Lord in different way like Peter. What is my gift? Passion, honest, fellowship, scientific study-> bible teaching, etc.
"Do and see how about the result if I trust in the Lord" is my first step to believe in Jesus. It is same as Simon Peter.
How?
But at your word I well follow it, I can give up all my idea or my consideration, but follow the guidance of the Lord.