Matthew 13:51
"Have you understood all these things?" They answered him, "Yes, Lord."
Matthew 13:11
And he answered them, "To you it is given to know the mysteries of the Kingdom of Heaven, but it is not given to them.
Matthew 13:19
When anyone hears the word of the Kingdom, and does not understand it, the evil one comes, and snatches away that which has been sown in his heart. This is what was sown by the roadside.
Matthew 15:17
Do you not understand that whatever goes into the mouth passes into the belly, and then out of the body?
Matthew 16:11
Why is it that you do not understand that I did not speak to you concerning bread? But beware of the yeast of the Pharisees and Sadducees."
Matthew 24:15
"When, therefore, you see the abomination of desolation, which was spoken of through Daniel the prophet, standing in the holy place (let the reader understand),
Mark 4:34
Without a parable he did not speak to them; but privately to his own disciples he explained everything.
Mark 7:18
He said to them, "Are you thus without understanding also? Do you not perceive that whatever goes into the man from outside cannot defile him,
Mark 8:17-18
He, perceiving it, said to them, "Why do you reason that it's because you have no bread? Do you not perceive yet, neither understand? Are your hearts hardened?
Luke 9:44-45
"Let these words sink into your ears, for the Son of Man will be delivered up into the hands of men."
Acts 8:30-31
Philip ran to him, and heard him reading Isaiah the prophet, and said, "Do you understand what you are reading?"
1 John 5:20
We know that the Son of God has come, and has given us an understanding, that we know him who is true, and we are in him who is true, in his Son Jesus Christ. He is the true God and eternal life.