How is it that you do not understand that I did not speak it to you concerning bread, that you should beware of the leaven of the Pharisees and of the Sadducees?
And he said to them, Are you thus without understanding also? Do you not perceive, that whatever thing from outside enters into the man, it cannot defile him;
But they did not understand this saying, and it was hid from them, so that they did not perceive it: and they feared to ask him concerning that saying.
For when by this time you ought to be teachers, you need someone to teach you again what are the first principles of the things spoken by God; and have become such as have need of milk, and not of strong food.