Jesus wants the disciples to be careful that they are not influenced by the Pharisees and Herod. Also, he wants to warn them that they do not become like the Pharisees and Herod. They must not be people who see Jesus’ miraculous signs but ignore them (e.g., Pharisees). They must not be people who hear Jesus’ message of repentance but ignore him (e.g., Herod).
14 Now they had forgotten to bring bread, and they had only one loaf with them in the boat.