John 3:4
Nicodemus said to him: How can a man be born when he is old? Can he enter his mother's womb the second time, and be born?
John 3:3
Jesus answered and said to him: Verily, verily I say to you, unless a man be born again, he can not see the kingdom of God.
John 4:11-12
The woman said to him: Sir, you have ho vessel with which you can draw, and the well is deep; whence have you that living water?
John 6:53
Then Jesus said to them: Verily, verily I say to you, Unless you eat the flesh of the Son of man, and drink his blood, you have no life in you.
John 6:60
Therefore, many of his disciples, when they heard him, said: This is a hard saying; who can hear it?
1 Corinthians 1:18
For the preaching of the cross is to those who perish, foolishness; but to us who are saved, it is the power of God.
1 Corinthians 2:14
But an animal man receives not the things of the Spirit of God, for they are foolishness to him, and he can not know them, because they are spiritually discerned.