it is again and again taught,thought and accepted that Jesus said and the Bible says that Christians must be born again - wincam
Here is what being born again is all about:
When Adam was created, he had both physical and Spiritual life.
When Adam (and Eve) disobeyed he (they) died Spiritually and later died physically.
Because Adam died Spiritually, he did not have Spiritual life to pass to his offspring.
By faith in the promises of Ge 3:15, and Lv 17:11, Old Testament believers had a promise of future Spiritual life.
Since ten days after Jesus ascended into heaven, the Holy Spirit has indwelt believers beginning from the time they come to faith.
This Spiritual indwelling is the restoration of Spiritual life. It is the second birth.