Charles Ellicott Commentary Matthew 16:11

"How is it that ye do not perceive that I spake not to you concerning bread? But beware of the leaven of the Pharisees and Sadducees." — Matthew 16:11 (ASV)

How is it that you do not understand? —True to His method of education, our Lord does not Himself interpret the parable, but is, as it were, content to suggest the train of thought which led to the interpretation. And the disciples, slow of heart as they were, followed the clue He gave. Then understood they. Memory at last enlivened faith, and faith imparted the imaginative insight which sees its way through parables and dark sayings.