John 3:4
Nicodemus said to him, How is it possible for a man to be given birth when he is old? Is he able to go into his mother's body a second time and come to birth again?
John 3:3
Jesus said to him, Truly, I say to you, Without a new birth no man is able to see the kingdom of God.
John 4:11-12
The woman said to him, Sir, you have no vessel and the fountain is deep; from where will you get the living water?
John 6:53
Then Jesus said to them, Truly I say to you, If you do not take the flesh of the Son of man for food, and if you do not take his blood for drink, you have no life in you.
John 6:60
Then, hearing this, a number of his disciples said, This is a hard saying; who is able to take in such teaching?
1 Corinthians 1:18
For the word of the cross seems foolish to those who are on the way to destruction; but to us who are on the way to salvation it is the power of God.
1 Corinthians 2:14
For the natural man is not able to take in the things of the Spirit of God: for they seem foolish to him, and he is not able to have knowledge of them, because such knowledge comes only through the Spirit.