Mark 7:18

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.

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 spoke 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 to them, Know ye not this parable? and how then will ye know all parables?

Luke 24:25

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

John 3:10

Jesus answered and said to him, Art thou a teacher 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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