The problem with external, Jesus reminds us, is not the attention on the outside cleanness. He does not criticize the outside cleanness. Instead, he is furious with the Pharisees preoccupation on the outside cleanness while ignoring the interior world of the heart, motives, intentions, and unrestrained desires. As he did in the Sermon on the Mount in specific detail, Jesus once again reminds us that no amount of external preoccupation with cleanness will make the interior world clean. Greed (things you got by cheating others) and self-indulgence (pleasing only yourselves) are the seeds of all sorts of unclean thoughts, motives, and actions. The outside cannot be made clean unless we address those issues.