This the fourth of a series of stories about bread and righteousness, in which the disciples again miss Jesus’ point. ”Bread” represents God’s provision, whether that be literal. But Jesus uses an unqualified object. It’s like saying, “I’m hungry for all the bread” or “all the water.” True believers are hungry for complete righteousness, not partial righteousness. It’s not OK to love God, and yet compromise in their language, practice dishonesty, or commit any sin’s.
The Yeast of the Pharisees and Herod it reads in Mark 8:14-21
The disciples had forgotten to bring bread, except for one loaf they had with them in the boat. “Be careful,” Jesus warned them. “Watch out for the yeast of the Pharisees and that of Herod.” They discussed this with one another and said, “It is because we have no bread.” Aware of their discussion, Jesus asked them: “Why are you talking about having no bread? Do you still not see or understand? Are your hearts hardened? Do you have eyes but fail to see, and ears but fail to hear? And don’t you remember? When I broke the five loaves for the five thousand, how many basketfuls of pieces did you pick up?” “Twelve,” they replied. “And when I broke the seven loaves for the four thousand, how many basketfuls of pieces did you pick up?” They answered, “Seven.” He said to them, “Do you still not understand?”