Mark 7:18

And He said to them, “Are you, too, so foolish and lacking in understanding? Do you not understand that whatever goes into the man from outside cannot defile and dishonor him,

Isaiah 28:9-10


They say “To whom would He teach knowledge?
And to whom would He explain the message?
Those just weaned from milk?
Those just taken from the breast?

Jeremiah 5:4-5


Then I said, “[Surely] these are only the poor (uneducated);
They are [sinfully] foolish and have no [spiritual] understanding,
For they do not know the way of the Lord
Or the ordinance of their God [and the requirements of His just and righteous law].

Matthew 15:16-17

And He said, “Are you still so dull [and unable to put things together]?

Matthew 16:11

How is it that you fail to understand that I was not talking to you about bread? But beware of the leaven of the Pharisees and Sadducees.”

Mark 4:13

Then He said to them, “Do you not understand this parable? How will you understand and grasp the meaning of all the parables?

Luke 24:25

Then Jesus said to them, “O foolish men, and slow of heart to trust and believe in everything that the prophets have spoken!

John 3:10

Jesus replied, “You are the [great and well-known] teacher of Israel, and yet you do not know nor understand these things [from Scripture]?

1 Corinthians 3:2

I fed you with milk, not solid food; for you were not yet able to receive it. Even now you are still not ready.

Hebrews 5:11

Concerning this we have much to say, and it is hard to explain, since you have become dull and sluggish in [your spiritual] hearing and disinclined to listen.

Treasury of Scripture Knowledge did not add