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 to him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
John 4:11-12
The woman saith unto him, Thou hast no bucket, and the well is deep: whence then canst thou have this water that giveth life?
John 6:53
Jesus therefore said to them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in yourselves.
John 6:60
Many therefore of his disciples, who heard him, said, Difficult is this discourse, who is able to fathom it?
1 Corinthians 1:18
For the discourse, [the subject of which is] the cross, is indeed to those who perish, folly; 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 folly to him: and he cannot know them, because they are spiritually discerned.