He turned to the crowd and asked them if they believed he could take a person across. Then he approached one man and asked him to get on his back and go with him. The man refused. You see, mental agreement with the facts, or even verbal agreement is not real trust. It is not real faith.
Faith produces faithfulness.
To trust Christ with our lives means that we put our lives in His hands by our actions. To follow Christ means we live for Him. The call goes forth in the authority and power of Jesus Christ. Our response can only be obedience. We can say that the call of Christ supercedes our occupation.