Cross reference
John 4:11
11 The woman saith unto him, Sir, thou hast nothing to draw with, and the well is deep: whence then hast thou that living water?
John 3:4
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?
1 Corinthians 2:14
14 Now the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him; and he cannot know them, because they are spiritually judged.