"Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God."  (John 3:3)
"Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever."  (1 Peter 1:23)
"Ye must be born again."  (John 3:7)
Read what Thomas Boston (1676 - 1732) writes about regeneration (being born again).