John 3:4
Nicodemus said to him, "How can a man be born when he is old? He cannot enter his mother's womb and be born a second time, can he?"
John 3:3
Jesus replied, "I tell you the solemn truth, unless a person is born from above, he cannot see the kingdom of God."
John 4:11-12
"Sir," the woman said to him, "you have no bucket and the well is deep; where then do you get this living water?
John 6:53
Jesus said to them, "I tell you the solemn truth, unless you eat the flesh of the Son of Man and drink his blood, you have no life in yourselves.
John 6:60
Then many of his disciples, when they heard these things, said, "This is a difficult saying! Who can understand it?"
1 Corinthians 1:18
For the message about the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.
1 Corinthians 2:14
The unbeliever does not receive the things of the Spirit of God, for they are foolishness to him. And he cannot understand them, because they are spiritually discerned.