John 3:4
Nicodemus said unto him, How can a man be born when he is old? Can he enter the second time into his mother's womb and be born?
John 3:3
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a person be born again from above, he cannot see the kingdom of God.
John 4:11-12
The woman said unto him, Sir, thou hast nothing to draw with, and the well is deep; from where then hast thou that living water?
John 6:53
Then Jesus said unto them, Verily, verily, I say unto you, Unless ye eat the flesh of the Son of man and drink his blood, ye shall have no life in you.
John 6:60
Many therefore of his disciples when they had heard this said, This is a hard word; who can hear it?
1 Corinthians 1:18
For the word of the cross is foolishness to those that perish, but unto us who are saved, it is the power of God.
1 Corinthians 2:14
But the natural man does not perceive the things of the Spirit of God, for they are foolishness unto him; neither can he understand them because they are spiritually discerned.