So, He entered one of the boats that belonged to Simon [i.e., Peter], and asked him to launch out a short distance from shore. Then He sat down and taught the crowds from the boat.
While Jesus was walking beside Lake Galilee, He saw two brothers; Simon called Peter, and his brother Andrew, casting their net into the lake, because they were fishermen.
He told His disciples to have a small boat waiting for Him [i.e., from which He could address the people. See 4:1], to prevent His being thronged by the large crowd.
For He had healed so many people that large numbers of them who were plagued with serious illnesses were crowding around Him in hope of getting to touch Him.