How is it that ye do not understand that I spoke not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees?
And he saith to them, Are ye so void of understanding also? Do ye not perceive, that whatever thing from without entereth into the man, it cannot defile him.
For when for the time ye ought to be teachers, ye have need of one to teach you again which are the first principles of the oracles of God; and are become such as have need of milk, and not of strong food.