Simply teaching the Bible, simply

In Matthew 15 vs 15 Jesus asked His disciples "Are you also still without understanding?" This question came after Jesus had spoken many things in Parables. Contrary to the way many view parables, they are not just quaint Sunday school stories! They are full of important instruction about and for the Church! They were not meant for the multitude, in fact, Jesus intentionally concealed these truths in Parables so that His own would understand, but the multitude, would not. In Matthew 13:11 we read: "And the disciples came, and said unto him, Why speakest thou unto them in parables? He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given". Yet after giving all these parables, so that His own would understand, we have the question above: "Are you also still without understanding?"