John 3:4
Nicodemus said unto him, "How can a man be born, when he is old? Can he enter into his mother's womb and be born again?"
John 3:3
Jesus answered, and said unto him, "Verily, verily I say unto thee: except a man be born anew, he cannot see the kingdom of God."
John 4:11-12
The woman said unto him, "Sir, thou hast no thing to draw it withal, and the well is deep: from whence then hast thou that water of life?
John 6:53
Then Jesus said unto them, "Verily, verily I say unto you, Except ye eat the flesh of the son of man, and drink his blood, ye shall not have life in you.
John 6:60
Many therefore of his disciples, when they had heard this, said, "This is a hard saying; Who can abide the hearing of it?"
1 Corinthians 1:18
For the preaching of the cross is, to them that perish, foolishness: but unto us which are saved, it is the power of God.
1 Corinthians 2:14
For the natural man perceiveth not the things of the spirit of God, for they are but foolishness unto him: Neither can he perceive them, because he is spiritually examined.