Mark 7:18

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;

Isaiah 28:9-10

Whom shall he teach knowledge? and whom shall he make to understand doctrine? them that are weaned from the milk, and drawn from the breasts.

Jeremiah 5:4-5

Therefore I said, Surely these are poor; they are foolish: for they know not the way of the LORD, nor the judgment of their God.

Matthew 15:16-17

And Jesus said, Are ye also yet without understanding?

Matthew 16:11

How is it that ye do not understand that I spake it not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees?

Mark 4:13

And he said unto them, Know ye not this parable? and how then will ye know all parables?

Luke 24:25

Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken:

John 3:10

Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things?

1 Corinthians 3:2

I have fed you with milk, and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able.

Hebrews 5:11

Of whom we have many things to say, and hard to be uttered, seeing ye are dull of hearing.

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