John 3:4
Nicodemus asked: How could a man be born when he is old? Can he enter his mother's womb again and be born?
John 3:3
Jesus answered: Truly I tell you unless a person is born again (brought forth from above) he cannot see the kingdom of God.
John 4:11-12
The woman said to him: Sir, you do not have anything with which to draw water and the well is deep. Where do you get that living water?
John 6:53
Jesus responded to them: Truly I tell you if you do not eat the flesh of the Son of man and drink his blood you will not have life in yourselves.
John 6:60
When they heard this many of his disciples said: This is a hard saying; who can listen to it?
1 Corinthians 1:18
For the preaching of the stake is foolishness to those who perish. It is the power of God to us who are saved.
1 Corinthians 2:14
But the natural man does not receive the things of the Spirit of God. They are foolishness to him! He cannot know them, because they are spiritually discerned.