Not every Christian is born again.

In Christian theology, being "born again" refers to a spiritual rebirth or transformation visible in the life and character of the person. The "born again" experience happens when an individual accepts Jesus Christ as their Lord and Savior.

There is more to it than saying, "I accept Jesus into my heart." There has to be a radical connection with the Holy Spirit, the Spirit of Jesus Christ. When made, a connection shows proof of an altered life that goes far beyond obeying proper doctrine.

There is actual evidence of a new heart inside of a person.

The term "heart" obviously is not a reference to the physical heart; in the Bible sense Lexicon, the heart is —

The locus of a person's thoughts (mind), volition, emotions, and knowledge of right from wrong (conscience).

The New Testament refers to this term in John 3:3, where Jesus tells Nicodemus, "Truly, truly, I say to you, unless one is born again, he cannot see the kingdom of God." Being born again is essential for entering heaven and involves repentance, faith in Christ, and often a life change characterized by increased devotion and ethical behaviour.