Verses for without understanding

Hear now this, O foolish people, and without understanding; which have eyes, and see not; which have ears, and hear not:

And he saith unto them, Are ye so without understanding also? Do ye not perceive, that whatsoever thing from without entereth into the man, it cannot defile him;

And Jesus said, Are ye also yet without understanding?

Without understanding, covenantbreakers, without natural affection, implacable, unmerciful: