Jesus' disciples had forgotten to bring any bread, so they had only one loaf with them in the boat.
He gave them strict orders: "Watch out and be on your guard for the yeast of the Pharisees as well as the yeast of Herod."
The disciples discussed this among themselves, "He said this because we have no bread."
Jesus knew what they were discussing and said, "Why are you talking about the fact that you don't have any bread? Don't you grasp what has happened? Don't you understand? Are your hearts so resistant to what God is doing?18 Don't you have eyes? Why can't you see? Don't you have ears? Why can't you hear? Don't you remember?19 When I broke five loaves of bread for those five thousand people, how many baskets full of leftovers did you gather?" They answered, "Twelve."
"And when I broke seven loaves of bread for those four thousand people, how many baskets full of leftovers did you gather?" They answered, "Seven."
Jesus said to them, "And you still don't understand?"