John 3:4
Nicodemus saith unto Him, How can a man be born when he is old? can he enter a second time into his mother's womb, and be born?
John 3:3
Jesus answered and said unto him, Verily verily I tell thee, Unless a man be born again, he cannot see the kingdom of God.
John 4:11-12
The woman saith unto Him, Sir, thou hast nothing to draw with, and the well is deep: whence then hast thou the living water?
John 6:53
Then said Jesus unto them, I tell you truly, that unless ye eat the flesh of the Son of man and drink his blood, ye have no life in you.
John 6:60
Many therefore of his disciples, when they heard Him, said, This discourse is hard to be understood, who can take it in?
1 Corinthians 1:18
For the doctrine of the cross is to them, that perish, foolishness: but to us, who are saved, it is the power of God.
1 Corinthians 2:14
But the natural man receiveth not the things of the Spirit of God: for they are foolishness to him; and he cannot understand them, because they are spiritually discerned.